Protocoelomata
原体腔动物
🗣️ 情景例句
It's not finished yet.
现在还没有完成。
But it's supposed to get cloudy and windy again this afternoon.
但是，据说今天下午又要转阴刮风了。
Rays from the sun excite and energize the atmosphere of the earth,
太阳光刺激了地球的大气层，并给予它能量；