Learn Hardcore Chinese: chèn zhìyuànzhě hái zài shèqū, yìqǐ bānyùn zhǐxiāng ba. - While the volunteers are still in the community, transport the cardboard boxes together.

Breakdown of chèn zhìyuànzhě hái zài shèqū, yìqǐ bānyùn zhǐxiāng ba.

What does 趁 mean here?

趁 means something like to take advantage of a situation while it lasts.

In this sentence, the pattern is:

趁 + someone/something + 还... = while ... is still ... / before the situation changes

So:

趁志愿者还在社区 = while the volunteers are still in the community = since the volunteers are still around, let's make use of that chance

It often introduces a good moment to do something before the opportunity disappears.

Examples:

Why is 还 used here? Does it mean also?

Here, 还 means still, not also.

Chinese 还 can have different meanings depending on context:

In this sentence:

So the idea is: they are still there now, which creates the opportunity mentioned by 趁.

Why is there a 在 before 社区?