Undersurface
n. 下面, 底面\\na. 水面下的
🗣️ 情景例句
He didn't get a thing to eat.
他什么也没有吃。
I wish I could find one just like it.
要是我也能碰到这样一件就好了。
If explosives are used, vibrations will cause the roof of the mine to collapse.
如果用炸药爆破，震动会引起矿顶塌落。