biànxiélú hé ránliào zài bēibāo lǐ.

Mandarin often does not use a separate verb like is/are when talking about location the way English does.

In 便携炉和燃料在背包里, the word 在 is doing the main job of saying where something is. So the structure is:

A 和 B 在 place 里
= A and B are in the place

So even though English needs are, Chinese does not add a separate 是 here. In fact, 是 would be wrong for location in this sentence.

• 便携炉和燃料在背包里。 = The portable stove and fuel are in the backpack.
• Not: 便携炉和燃料是背包里。

Here, 在 means to be at/in/on a place, or more generally it marks location.

In this sentence, it tells you where the portable stove and fuel are:

• 在背包里 = in the backpack

So 在 is essential for showing location here.

You will often see this pattern:

noun + 在 + place
= noun is at/in/on place

Examples:

• 书在桌子上。 = The book is on the table.
• 手机在包里。 = The phone is in the bag.

They work together, but they do different jobs.

• 在 marks that something is located somewhere.
• 里 means inside.

So:

• 在背包里 = in the backpack
• literally something like located at backpack-inside

If you only had 在背包, that would sound incomplete or unnatural in this context, because 背包 means backpack, but 里 tells you specifically inside the backpack.

Compare:

• 在桌子上 = on the table
• 在房间里 = in the room
• 在学校 = at school

Sometimes Chinese uses just 在 + place, and sometimes 在 + place + 里/上/下 depending on what kind of location is meant.

Yes. 背包里 and 背包里面 both mean inside the backpack.

• 里 is shorter and very common.
• 里面 is a little fuller and can sound slightly more explicit.

So these are both fine:

• 便携炉和燃料在背包里。
• 便携炉和燃料在背包里面。

The meaning is basically the same in this sentence.

Yes, here 和 means and, joining two nouns:

• 便携炉和燃料 = the portable stove and fuel

This is one of the most common ways to say and between nouns in Mandarin.

A few notes:

• 和 is very natural for joining nouns.
• It is not always used exactly like English and in every situation, especially when joining whole clauses or verbs.

In this sentence, though, it is straightforward:

• A 和 B = A and B

That is a very common Mandarin word order.

The basic pattern here is:

thing + 在 + place

So:

• 便携炉和燃料 = the portable stove and fuel
• 在背包里 = are in the backpack

Putting it together:

• 便携炉和燃料在背包里。

This is normal Mandarin sentence order.

English also often does something similar:

• The stove and fuel are in the backpack.

So the order is not too different from English once you understand that 在 is carrying the meaning of are in.

Chinese nouns usually do not change form for singular vs. plural.

So:

• 背包 can mean backpack or backpacks, depending on context.
• 燃料 can mean fuel in a general sense, and context tells you more if needed.

In this sentence, English would usually translate it naturally as:

• The portable stove and fuel are in the backpack.

But depending on context, it could also be:

• Portable stoves and fuel are in the backpacks.
• The portable stove and the fuel are in a backpack.

Chinese often leaves number unstated unless it matters.

Mandarin does not have articles like English a/an/the.

So a bare noun like 背包 can mean:

• a backpack
• the backpack
• backpacks

Context decides.

That is why the sentence does not include separate words for the or a. This is very normal in Chinese.

If a speaker wants to be more specific, they can add other words, for example:

• 这个背包 = this backpack
• 那个背包 = that backpack
• 一个背包 = a backpack

But in your sentence, the nouns are left general because that is enough.

Yes, you could, and it is very natural. But the focus changes slightly.

1. 便携炉和燃料在背包里。
   Focus: The portable stove and fuel are in the backpack.
   This is a statement about the location of those items.

2. 背包里有便携炉和燃料。
   Focus: There is a portable stove and fuel in the backpack.
   This introduces what is inside the backpack.

So:

• A 在 B 里 = A is in B
• B 里有 A = There is A in B

Both are correct, but they present the information differently.

Measure words are usually needed in Mandarin when a number or demonstrative directly modifies a noun.

For example:

• 一个背包 = one backpack
• 这个背包 = this backpack

But in your sentence, the nouns are not being counted or directly specified with a demonstrative. They are just mentioned in a general way:

• 便携炉
• 燃料
• 背包

So no classifier is needed.

Yes, 便携炉 is a compound noun.

It can be broken down like this:

• 便携 = portable
• 炉 = stove / burner / furnace

So 便携炉 literally means portable stove.

Chinese often forms nouns this way by combining descriptive parts into a single compound.

Normally, no. If you want to say the portable stove and fuel, you need a connector such as 和.

So:

• 便携炉和燃料在背包里。 = correct

Without 和, it would sound incomplete or unclear:

• 便携炉燃料在背包里。 = not natural for this meaning

If you wanted a different structure, you would need to rephrase the sentence.

In 便携炉, 便 is pronounced biàn.

So the whole word is:

• 便携炉 = biànxiélú

This is worth noticing because 便 can have different pronunciations in different words. But in 便携, it is definitely biàn.

Not always, but it is needed in many cases when you specifically mean inside something.

For containers or enclosed spaces, 里 is very common:

• 在包里 = in the bag
• 在房间里 = in the room
• 在箱子里 = in the box

Some place words can appear without 里, especially when the place is treated more like a general location:

• 在学校 = at school
• 在家 = at home

But for backpack, using 里 is the natural way to say in the backpack.