dì zhì / lǎo shī / tí xǐng / wǒ men / bú yào / chù mō / shí zhōng rǔ / yīn wèi / shǒu / shàng / de / yóu zhī / huì / yǐng xiǎng / tā / jì xù / chén jī

地质老师提醒我们不要触摸石钟乳，因为手上的油脂会影响它继续沉积。

The geology teacher reminded us not to touch the stalactites because the oils on our hands can affect their continued deposition.