Perienteron
[医] 肠周腔(胚)
🗣️ 情景例句
Do we have to pre-book tours, or can we get them on site?
我们必须预定行程， 还是到那个地方再说？
Please try it.
请试试看。
Two main techniques have been used for training elephants,
驯象有两种主要的方法，