The certificate is within its validity period.

凭证仍在有效期内。

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You must accept the offer within its validity period, otherwise we'll withdraw it.

贵方必须在报盘有效期内接受此盘，否则我们将撤盘。

youdao

You must accept the offer within its validity period, otherwise we'll withdraw it.

贵方必须在报盘有效期内接受此盘，否则我们将撤盘。

youdao