Ocean trench
海沟
🧩 词语组成解析
ocean
['oʃən]
n. 洋;海洋;大海;（地球上划分出的）洋;
🗣️ 情景例句
The selection here is very large, it may be difficult to choose.
这里有很多式样可以选，可能很难决定。
To examine the problem
检讨问题
It's nothing serious.You'd better have a good rest.
（病情）不太严重。你最好好好休息一下。