Pentaether
五醚, 四甘醇二丁醚
🗣️ 情景例句
Can you tell me something about the student body?
谁是学生会主席？
None so deaf as those that won't hear.
置若罔闻。
We agree to insert a clause giving you a ten-day grace period.
我们同意给你加上一条10天宽限期的条款。