Nitrocementation
碳氮共渗
🗣️ 情景例句
I just took the wrong train.
只是我坐错了车。
I'm the thinnest boy in my team.
我是我的那一队伍中最廋的男孩。
Let us suppose that a child suddenly crosses the road in front of you.
让我们假设一个小孩子突然在你前面穿过马路。