Methylurea
[化] 甲脲
🗣️ 情景例句
Freeze!
别动！
Only certain people are permitted to enter that club.
只有特定的人才被允许进入该俱乐部。
When it has been decided where we are going to drill, we put up at the surface an oil derrick.
当确定钻孔地点后，我们就在那里竖起一个井架。