Methylenation
[化] 亚甲基化作用
🗣️ 情景例句
autograph copies for the guests at the opening?
在展览开幕时为客人在书上亲笔签名呢
That's too loud.
声音太大了。
Can you imagine how much he paid for that car?
你能想象他买那车花了多少钱吗？