Definition: to move or make something move to a lower position or level Level: B2
太阳缓缓沉入地平线以下，发出红色的光芒。
The sun glowed red as it ___sank slowly below the horizon.
今年学生人数大幅下降。
Student numbers have ___sunk considerably this year.
多拉脸色苍白，瘫坐在椅子上。
Dora's face grew pale and she ___sank into a chair.
