Zuò / shíyàn / shí / lǎoshī / tíxǐng / wǒmen / bú / yào / zhíjiē / yòng / shǒu / jiēchù / hóng / lín

做实验时，老师提醒我们不要直接用手接触红磷。

During the experiment, the teacher reminded us not to touch red phosphorus directly with our hands.