Pentaether
五醚, 四甘醇二丁醚
🗣️ 情景例句
How about some ice?
来点冰怎么样？
If you agree to carry the calf, they'll make you carry the cow.
得寸进尺。
'What a pity!' Susan exclaimed.
“真可惜！”苏珊大声说。