jìn / rù / shí / yàn / qū / yǐ / qián / suǒ / yǒu / rén / yuán / dōu / yào / jīng / guò / zhēn / dú / qì / jiǎn / cè

进入实验区以前，所有人员都要经过侦毒器检测。

Before entering the laboratory area, everyone must undergo testing with a poison detector.