The recruits were thoroughly vetted before they were allowed into the secret service.
情报机关招募的新成员要经过严格的审
。
，审核程序The recruits were thoroughly vetted before they were allowed into the secret service.
情报机关招募的新成员要经过严格的审。
She took her old dog to the vet and he put it to sleep.
那条老狗到兽
那里，兽给它
安乐死。
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