shí yàn shì / bì xū / yán gé / zhí xíng / zhān rǎn kòng zhì / chéng xù / fáng zhǐ / yàng pǐn / bèi / wū rǎn

实验室必须严格执行沾染控制程序，防止样品被污染。

The laboratory must strictly implement contamination control procedures to prevent sample contamination.