Di dalam gerbong, saya memilih bangku dekat jendela supaya tidak terlalu pusing.

Di dalam gerbong means inside the carriage/train car.

• di = in / at / on, as a preposition of location
• dalam = inside, interior
• gerbong = carriage, train car, wagon

So di dalam literally means in the inside of or more naturally inside.

You will often see:

• di gerbong = in the carriage
• di dalam gerbong = inside the carriage

Both are possible, but di dalam feels a bit more explicit about being physically inside.

Not exactly.

• kereta or kereta api = the train
• gerbong = one car/carriage of the train

So if someone says di dalam gerbong, they are talking about being inside one section of the train, not the train as a whole.

Both mean I, but they differ in register.

• saya = neutral, polite, standard
• aku = more casual, personal, informal

In a general written sentence like this, saya is the safest and most standard choice.

So:

• saya memilih... sounds normal in neutral or polite Indonesian
• aku memilih... would sound more casual and conversational

By itself, memilih does not mark tense the way English verbs do.

It can mean:

• choose
• am choosing
• chose
• have chosen

The time is understood from context.

In this sentence, English might translate it as:

• I chose a seat near the window... or
• I choose a seat near the window...

depending on the context.

Indonesian often leaves tense unstated unless a time word makes it clear, such as:

• kemarin = yesterday
• tadi = earlier
• besok = tomorrow

Memilih is the active verb form built from the root pilih.

• pilih = choose (root/base)
• memilih = to choose / choose, in standard active usage

The prefix meN- often forms active verbs in Indonesian. Here it becomes mem- because of the sound at the start of the root.

Compare:

• Saya memilih bangku ini. = I choose this seat.
• Pilih bangku ini. = Choose this seat. (command)

So memilih is the normal form after a subject like saya.

Both can refer to something you sit on, but there is a slight difference.

• kursi = chair/seat, often the more general word
• bangku = bench, stool, or seat; in transportation it can also refer to a seat

In real usage, both may be heard for train or bus seating depending on region and context. In this sentence, bangku dekat jendela means a seat near the window.

So this sentence could also naturally be phrased with kursi:

• saya memilih kursi dekat jendela

But bangku is not wrong here.

Indonesian often omits yang when the meaning is already clear and the phrase is simple.

So:

• bangku dekat jendela = the seat near the window
• bangku yang dekat jendela = the seat that is near the window

Both are grammatical.

The version without yang is more compact and very natural in everyday Indonesian, especially with short descriptive phrases like:

• rumah dekat pasar = a house near the market
• orang dari Jakarta = a person from Jakarta

Indonesian does not have articles like a, an, and the in the same way English does.

So:

• bangku can mean a seat or the seat
• jendela can mean a window or the window

Context tells you which one is meant.

In this sentence:

• bangku dekat jendela is naturally understood as a seat near the window

Supaya means so that, in order that, or so.

In this sentence:

• supaya tidak terlalu pusing = so that I won’t get too dizzy / so as not to feel too dizzy

Similar words:

• agar = also so that, often slightly more formal
• biar = can also mean so that / let, but is more colloquial and has other uses

Examples:

• Saya duduk dekat jendela supaya tidak mabuk perjalanan.
• Saya duduk dekat jendela agar tidak mabuk perjalanan.

Both are fine. Supaya is very common and natural.

It can say that, but Indonesian often omits the subject when it is already obvious.

So both are possible:

• supaya tidak terlalu pusing
• supaya saya tidak terlalu pusing

The shorter version is natural because the subject is clearly still saya.

This kind of omission is very common in Indonesian when the meaning stays clear.

Pusing can mean a few related things depending on context:

• dizzy
• having a headache
• feeling lightheaded
• sometimes even mentally overwhelmed, in other contexts

Here, because the person chooses a window seat in a train carriage, pusing most likely means dizzy or travel-sick/lightheaded.

Terlalu means too or too much, so:

• tidak terlalu pusing = not too dizzy / not too sick / not too lightheaded

Both are possible, but they are slightly different in meaning.

• supaya tidak pusing = so that I am not dizzy at all
• supaya tidak terlalu pusing = so that I am not too dizzy / not overly dizzy

Adding terlalu softens it. It suggests the goal is to reduce the discomfort, not necessarily eliminate it completely.

The sentence breaks down like this:

• Di dalam gerbong = location phrase
• saya = subject
• memilih = verb
• bangku dekat jendela = object + description
• supaya tidak terlalu pusing = purpose clause

So the structure is roughly:

Location + Subject + Verb + Object + Purpose

More literally:

• Inside the carriage, I choose a seat near the window so as not to get too dizzy.

Yes, some parts can move around.

For example:

• Saya memilih bangku dekat jendela di dalam gerbong supaya tidak terlalu pusing.
• Saya memilih bangku dekat jendela supaya tidak terlalu pusing.
• Di dalam gerbong, saya memilih bangku dekat jendela supaya tidak terlalu pusing.

The original sentence begins with Di dalam gerbong to set the scene first. That is very natural.

Both can be used, but dekat jendela is very natural here.

• bangku dekat jendela = a seat near the window
• bangku di dekat jendela = a seat that is located near the window

The version without di is often more compact when dekat jendela is functioning like a descriptor after a noun.

So bangku dekat jendela sounds normal and idiomatic.

Yes, very easily.

Choosing a seat near the window to avoid feeling pusing strongly suggests trying to reduce:

• dizziness
• nausea
• travel sickness

A learner might also hear related expressions like:

• mabuk perjalanan = motion sickness / travel sickness
• supaya tidak mabuk perjalanan = so that I don’t get motion sick

So this sentence naturally gives the idea of avoiding discomfort during the trip.