Hydrooptics
水域光学
🗣️ 情景例句
His daughter is sick.
他女儿生病了。
Two wrongs don't make a right.
两个错误不能构成一个正确。
Looking round, I realized with a shock that I was the only passenger left on the bus.
我环视了一下身旁，惊奇地发现车里就只剩我一个乘客了。