这些支票只有在副签后才有效。

These checks are not valid until they are countersigned.

youdao

好的，我很高兴为您兑现支票。请您将支票副签一下。

Yes, I'll be happy to cash these for you. Would you please countersign them here?

youdao

职员：好的，我很高兴为您兑现支票。请您将支票副签一下。

Yes, I'll be happy to cash these for you . Would you please countersign them here?

youdao

职员：好的，我很乐意为您兑现。请您将这些支票副签一下，好吗？

Clerk: Yes, I'll be happy to cash these for you. Would you please countersign them here?

youdao

职员：好的，我很乐意为您兑现。请您将这些支票副签一下，好吗？

Clerk: Yes, I'll be happy to cash these for you. Would you please countersign them here?

youdao