xǐyīfěn hé róushùnjì zài xǐyījī pángbiān.

和 means and here. It links 洗衣粉 and 柔顺剂, so the sentence is talking about laundry detergent and fabric softener together.

In this sentence:

• 洗衣粉 和 柔顺剂 = laundry detergent and fabric softener

So these two things together are the subject of the sentence.

Chinese location phrases usually go:

在 + place + location word

So:

• 在洗衣机旁边 = beside the washing machine
• literally: at washing machine side

Here, 旁边 is a location word meaning side / beside, and it usually comes after the noun it relates to:

• 桌子旁边 = beside the table
• 门旁边 = beside the door
• 洗衣机旁边 = beside the washing machine

That is the normal Chinese pattern.

在 marks location here. It tells you where something is.

So:

• A 在 B = A is at/in/on/by B

In this sentence:

• 洗衣粉和柔顺剂在洗衣机旁边
• The detergent and the softener are beside the washing machine

It works a bit like is/are at in English, but Chinese does not need a separate word for are here.

Because 是 is usually not used to link a noun to a location.

In Chinese, for location, you normally use:

• A 在 + place

not

• A 是 + place

So:

• 书在桌子上。 = The book is on the table. ✅
• 书是桌子上。 ❌

Likewise:

• 洗衣粉和柔顺剂在洗衣机旁边。 ✅

This is a very common point for English speakers, because English uses is/are, but Chinese often does not.

Yes. 洗衣粉和柔顺剂 is a combined subject, so the sentence means that both the detergent and the fabric softener are beside the washing machine.

It does not mean one is beside the other. It means both are in that location.

旁边 means beside, next to, or at the side of.

• 旁 = side
• 边 = side/edge

Together, 旁边 is a very common location word meaning the side of something.

You may also see:

• 旁 in some expressions
• 边上
• 旁边

For learners, 旁边 is the safest and most common everyday form to use.

Examples:

• 我在你旁边。 = I’m beside you.
• 椅子在桌子旁边。 = The chair is beside the table.

Yes. It is a noun + location word phrase:

• 洗衣机 = washing machine
• 旁边 = side / beside

Together:

• 洗衣机旁边 = the side of the washing machine / beside the washing machine

This whole part acts as the location inside the larger phrase:

• 在洗衣机旁边 = beside the washing machine

Normally, no. That sounds incomplete or ungrammatical in standard Mandarin.

You usually need 在 to introduce the location:

• 洗衣粉和柔顺剂在洗衣机旁边。 ✅

Without 在, the relationship between the items and the location is unclear.

They are both compound nouns.

洗衣粉

• 洗 = wash
• 衣 = clothes
• 粉 = powder

So 洗衣粉 literally means clothes-washing powder, i.e. laundry detergent in powder form.

柔顺剂

• 柔顺 = soft and smooth / compliant
• 剂 = agent / product / chemical preparation

So 柔顺剂 means fabric softener or softening agent.

A useful note: in everyday use, 洗衣液 is liquid laundry detergent, while 洗衣粉 is powdered detergent.

Not here.

This sentence is talking about the items in a general way, like the detergent and the softener are beside the washing machine. No number is given, so no measure word is needed.

If you wanted to count them, then you would use measure words, for example:

• 一袋洗衣粉 = one bag of detergent
• 一瓶柔顺剂 = one bottle of fabric softener

But in the original sentence, none is necessary.

Yes. That is also natural, but it shifts the focus slightly.

Original sentence:

• 洗衣粉和柔顺剂在洗衣机旁边。
• Focus: the detergent and softener — where are they?

With 有:

• 洗衣机旁边有洗衣粉和柔顺剂。
• Focus: beside the washing machine — what is there?

Both are correct. The difference is mainly what the sentence is centered on.

In careful pronunciation, yes, 和 is read hé here and means and.

In fast everyday speech, native speakers may sometimes pronounce it more lightly, but learners should say hé.

So the safe pronunciation is:

• 洗衣粉和柔顺剂
• xǐyīfěn hé róushùnjì

Yes, in everyday spoken Mandarin, 跟 can also mean and in this kind of sentence.

So this is possible:

• 洗衣粉跟柔顺剂在洗衣机旁边。

That said:

• 和 sounds slightly more neutral and standard
• 跟 is very common in speech

For learners, both are useful, but 和 is a very good default choice.

The structure is:

Noun 1 + 和 + Noun 2 + 在 + place

In this sentence:

• 洗衣粉 = noun 1
• 和 = and
• 柔顺剂 = noun 2
• 在 = at/in/by
• 洗衣机旁边 = place

So the full pattern means:

A and B are at/by some place

This is a very common and useful Mandarin sentence pattern for talking about location.