Sierras
n. 齿状山脊, 马鲛( sierra的复数形式 )
🗣️ 情景例句
Is that one of the things Susan and Harry are bringing?
那是不是属于Susan和Harry要带的？
When the sun comes in, the doctor goes out.
阳光入室，医生出屋。
I want some envelopes,please.
请给我拿几个信封。