Pentaether
五醚, 四甘醇二丁醚
🗣️ 情景例句
I'd like your help.
我要请你帮忙。
More haste, less speed.
欲速则不达。
The world had to wait almost another 100 years for the Channel Tunnel.
世界不得不再等将近100年才看到海峡隧道竣工。