所有样品都要经过第三方机构验过之后,才能进入临床阶段。Suǒyǒu yàngpǐn dōu yào jīngguò dì sānfāng jīgòu yàn guò zhīhòu, cái néng jìnrù línchuáng jiēduàn.All samples must be checked by a third-party institution before they can enter the clinical stage.
海关工作人员仔细验看了他的签证。Hǎiguān gōngzuò rényuán zǐxì yànkàn le tā de qiānzhèng.The customs officers carefully examined his visa.
新桥建成前,工程师反复验算每一项数据。Xīn qiáo jiànchéng qián, gōngchéngshī fǎnfù yànsuàn měi yī xiàng shùjù.Before the new bridge was completed, the engineers double-checked every figure again and again.