What is the expiry date on your library novel?
你从国书馆借的小说书哪一天?
What is the expiry date on your library novel?
你从国书馆借的小说书哪一天?
A surveillance audit is carried out once a year within the three-year validity period and recertification audit will be conducted at the expiry of the three-year period.
在三年有效内每年进行一次监督审核,三年进行再认证审核。
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