Mesectoderm
中外胚层
🗣️ 情景例句
Sure I could. It's my turn to treat.
我当然可以这样。轮到我请客了。
I'm sorry. I'm engaged now.
对不起，我现在正忙着。
Yes. Go along Zhongshan Road, and turn right at the second crossing. Go across the bridge.
可以。沿着中山路走，在第二个十字路口处进右拐弯。过桥后。