Pentaether
五醚, 四甘醇二丁醚
🗣️ 情景例句
It's getting late. Please excuse me, but I must leave right away.
时间不早了。对不起，我得赶紧走了。
To mold clay
铸模
After we had landed, the plane was searched thoroughly.
我们降落之后，飞机被彻底搜查了一遍。