Photoelimination
[化] 光消去反应
🗣️ 情景例句
I have been learning English for three years now.
我学英语有3年了。
I'm not strong enough.
我还不够强壮。
Were you in San Francisco at the time of the big earthquake in 1989?
1989年旧金山大地震时，你在那儿吗？