tā bú tài xíguàn zhè gè chéngshì de huǒchēzhàn, zǒngshì zài lǐmiàn zǒucuò lù.

Because of a common tone change rule.

不 is normally fourth tone: bù.
But when it comes right before another fourth-tone syllable, it changes to second tone: bú.

So:

• 不太 → bú tài
• 不是 → bú shì
• 不要 → bú yào

The character is still 不; only the pronunciation changes.

不太 usually means not very or not quite.

So 不太习惯 means:

• not very used to
• not quite accustomed to

It sounds a little softer than just 不习惯, which can sound more direct.

Here, 习惯 means to be used to or to be accustomed to.

So:

• 习惯这个城市的火车站 = be used to this city’s train station

A useful pattern is:

• 习惯 + noun/place/situation

For example:

• 我习惯这里的天气。 = I’m used to the weather here.

Also, in other sentences, 习惯 can be a noun meaning habit, but here it is clearly about being accustomed to something.

Because Mandarin normally uses a measure word between a demonstrative and a noun.

The pattern is:

• 这 / 那 + measure word + noun

So:

• 这 + 个 + 城市 = this city

个 is the most common general measure word.
In natural speech, it is often pronounced lightly as ge.

的 links a modifier to a noun.

So:

• 这个城市的火车站 literally means this city’s train station or the train station of this city

Here, 这个城市 modifies 火车站.

Important point: 的 does not only show ownership. It can also show a relationship such as:

• location
• association
• belonging
• description

So this phrase is not necessarily about possession in a strict sense. It just means the train station associated with that city.

By itself, Chinese often leaves that to context.

It could mean:

• the train station in this city if one specific station is being discussed
• more generally this city’s train station(s) depending on the situation

Unlike English, Mandarin does not have articles like the or a, and nouns do not always show singular/plural clearly. Context usually tells you what is meant.

Because Chinese often omits repeated subjects when they are already clear.

So instead of saying:

• 她不太习惯……，她总是在里面走错路。

it is very natural to say:

• 她不太习惯……，总是在里面走错路。

The subject 她 is understood from the first clause.

总是 means always or all the time.

It shows that this is a repeated pattern, not just a one-time mistake.

So the sentence is not saying she got confused once. It says she does this regularly.

It can also give a slight feeling of:

• frustration
• complaint
• emphasis on repetition

在 marks the location where the action happens.

So:

• 在里面 = inside / in there

In the sentence:

• 总是在里面走错路

the meaning is that the action of going the wrong way happens inside the train station.

This is a very common structure:

• 在 + place + verb

For example:

• 在学校学习 = study at school
• 在家吃饭 = eat at home

Both relate to inside.

• 里 = inside
• 里面 = inside, the inside area, interior

里面 often sounds a bit fuller or more explicit than 里.

For a large place like a train station, 里面 sounds very natural because it emphasizes the interior space.

It is a very useful pattern.

Break it down like this:

• 走 = walk/go
• 错 = wrongly
• 路 = road/path/way

Here 错 is a resultative complement. It shows that the action was done incorrectly.

So 走错路 means:

• take the wrong route
• go the wrong way

This pattern appears a lot in Mandarin:

• 看错 = see/read wrongly
• 写错 = write wrongly
• 买错 = buy the wrong thing
• 说错 = say something wrong

Not exactly.

• 走错路 = take the wrong route / go the wrong way
• 迷路 = get lost

If you 走错路, you may simply choose the wrong path.
If you 迷路, you lose your sense of where to go.

So 走错路 can be one specific mistake, while 迷路 is usually a broader state of being lost.

Because Mandarin usually puts location phrases before the main verb.

The common order is:

• subject + 在 + place + verb

So:

• 她总是在里面走错路

is the natural order.

Putting 在里面 after 走错路 would sound unnatural in standard Mandarin.

The comma links two closely related parts of the sentence:

• 她不太习惯这个城市的火车站
• 总是在里面走错路

In English, you might connect them with and, so, or just a pause.
In Chinese, commas are often used very freely to connect related ideas when the relationship is already clear from context.

Here, the second part feels like a result or consequence of the first part.