Eteline
四氟乙烯
🗣️ 情景例句
No, I could never agree to sign this contract.
不，我无论如何也不会签这份合同。
Roll my log and I'll roll yours.
互相吹嘘。
Then knowledge began to be accumulated according to a systematic plan.
于是，知识便开始有系统有计划地积累起来。