shí yàn kè / shàng / lǎo shī / tí xǐng / wǒ men / qīng yǎng huà nà / jù yǒu / qiáng / fǔ shí xìng

实验课上，老师提醒我们氢氧化钠具有强腐蚀性。

In the lab class, the teacher reminded us that sodium hydroxide is highly corrosive.