Rflp
[化] 限制片长多态性
🗣️ 情景例句
He has a big sales office in Los Angeles,
他在Los Angeles有一个大的销售办事处，
I wrote several letters on my mother's behalf.
我代表我母亲写了几封信。
It was upon this principle that the first instruments were made,
据这一原理，制造出了最初的地震仪器，