vi. 淹没;下落;退去;渐渐进入;
vt. 使下沉;使下垂;砸入地面;使败落;
n. 水池;洗涤槽;污水坑;
🗣️ 情景例句
Sure.
当然。
No, I'm a single son.
没有,我是独生子。
Although mankind has undergone no general improvement in intelligence or morality, it has made extraordinary progress in the accumulation of knowledge.