Eppa
abbr. 4-ethoxy-2-hydroxyphenyl propionic acid 4-乙氧基-2-羟苯基丙酸（科技符号）
🗣️ 情景例句
You've been a very helpful.
你帮了大忙。
My son has outgrown these trousers.
我儿子已经长的穿不了这条裤子了。
I have just received a letter from my old school, informing me that my former headmaster,
我刚刚收到母校的一封信，通知我说以前的校长