Rief
abbr. recycling isoelectric focusing 再循环等电聚焦
🗣️ 情景例句
How much notice of cancellation is necessary to get my deposit back?
想把定金拿回来，要提前多长时间通知你才行？
You are smaller than I am.
你比我小。
The bus was full. We couldn't get on.
车挤得满满的，我们上不去。