chèn jiùwù hái zài zhèlǐ, xiān xiāodú ba.

趁 means to take advantage of a certain time or situation. In this sentence, it is similar to while or before the situation changes.

So 趁旧物还在这里 means something like:

• while the old items are still here
• since the old items are still here, let’s take this chance...

A very common pattern is:

趁 + situation/time, ...

For example:

• 趁天还没黑，快回家。
  While it’s not dark yet, go home quickly.
• 趁大家都在，我们开始吧。
  Since everyone is here, let’s start.

Here, 还 means still, not also.

So:

• 旧物还在这里 = the old items are still here

This is a very common use of 还:

• 他还没来。 = He still hasn’t come.
• 书还在桌子上。 = The book is still on the table.

Learners often first learn 还 as also, but in many sentences it means still/yet. Context tells you which meaning is intended.

旧物 literally means old things/items. Depending on context, it can mean:

• old belongings
• old objects
• used items
• old possessions

It is a bit more formal or written than everyday 旧东西. In daily speech, native speakers might often say:

• 旧东西
• 这些旧的东西
• 这些旧物品

So 旧物 is understandable, but it has a slightly more formal or literary feel.

在这里 means be here / be in this place.

In Mandarin, 在 can work as a verb meaning to be located at. So:

• 旧物还在这里
  = the old items are still here

The structure is:

subject + 还 + 在 + place

Examples:

• 他还在家。 = He is still at home.
• 钥匙还在包里。 = The keys are still in the bag.

So 在这里 is not just at here word-for-word; it is the normal way to say something is located here.

先 means first. It usually comes before the verb it modifies.

So:

• 先消毒 = disinfect first

In Mandarin, adverbs like 先, 再, 都, 也, 还 usually come before the verb.

Examples:

• 先吃饭，再工作。
  Eat first, then work.
• 我们先看看吧。
  Let’s take a look first.

In this sentence, 先 suggests that disinfecting is the first action, probably before doing something else with the items.

吧 softens the sentence and makes it sound like:

• a suggestion
• a proposal
• a gentle command
• let’s...
• ...okay?

So 先消毒吧 sounds like:

• Let’s disinfect them first.
• We should disinfect them first.
• Go ahead and disinfect them first.

Without 吧, the sentence would sound more direct:

• 先消毒。 = Disinfect first.

With 吧, it is softer and more natural in many everyday situations.

Yes. Mandarin often leaves out the subject when it is clear from context.

The sentence does not explicitly say who should disinfect the items. Depending on context, it could mean:

• Let’s disinfect them first
• You should disinfect them first
• We should disinfect them first

This kind of omission is very common in Chinese. English usually needs a subject, but Chinese often does not.

A useful way to see it is:

趁 + situation, 先 + action + 吧

So here:

• 趁旧物还在这里 = while the old items are still here
• 先消毒吧 = let’s disinfect them first

Together:

While the old items are still here, let’s disinfect them first.

This pattern is very natural in Mandarin when someone wants to say:

• take advantage of the current situation
• do something before it is too late
• do one action first because the conditions are right now

Yes. 消毒 means to disinfect / sterilize, and it can be used for:

• objects
• rooms
• hands
• surfaces
• equipment

Examples:

• 给房间消毒 = disinfect the room
• 给餐具消毒 = disinfect the tableware
• 先把这些旧物消毒一下 = first disinfect these old items a bit

So using 消毒 with 旧物 is perfectly possible, especially if the concern is hygiene.

The object is understood from context: it is 旧物.

Chinese often leaves out an object if it is obvious. So:

• 先消毒吧
  naturally means let’s disinfect the old items first

If you wanted to make it fully explicit, you could say:

• 先给旧物消毒吧
• 先把旧物消毒吧

But once 旧物 has already been mentioned, leaving it out is normal.

It is close in meaning, but not exactly identical.

趁旧物还在这里 focuses on taking advantage of the current situation:

• while the old items are still here
• since they’re still here right now

English before the old items are gone emphasizes the future change more directly.

So the Chinese phrase has a nuance of:

• this is a good chance
• do it now while the condition still holds

That is why 趁 is important.

Both are possible.

• 这里 is a little more neutral and standard.
• 这儿 is more colloquial in many northern varieties of Mandarin.

So these are both natural:

• 旧物还在这里
• 旧物还在这儿

The meaning is the same: the old items are still here.

Yes. In casual speech, many native speakers might say:

• 旧东西
• 这些旧东西
• 这些旧物品

For example:

• 趁这些旧东西还在这里，先消毒吧。

That may sound more conversational than 旧物, depending on the context.

So the original sentence is understandable, but 旧物 can sound slightly more formal, written, or context-specific.

Yes:

• 趁 = while / taking advantage of
• 旧物 = old items / old belongings
• 还 = still
• 在这里 = be here
• 先 = first
• 消毒 = disinfect
• 吧 = softening particle, like let’s... / okay

So the sentence is roughly:

While the old items are still here, let’s disinfect them first.