Phosphonoacetone
二氧磷基丙酮
??? 情景例句
I must have see you somewhere before.
我一定在哪里見過你。
Discretion is the better part of valour.
小心即大勇。
'A new play is coming to The Globe soon,' I said.
“一出新劇要來‘環(huán)球劇場’上演了，”我說，