Pentaether
五醚, 四甘醇二丁醚
🗣️ 情景例句
Tomorrow at five o'clock at the Biltmore.
明天五点钟， 在Biltmore饭店。
Charity begins at home, but should not end there.
仁爱须由近及远。
How do you manage in your wheelchair?
你坐在轮椅上怎么能旅游呢？