Perigynium
雄器苞
🗣️ 情景例句
Jack's genius at business.
杰克是个经商的天才。
I'm going to lend her two cans.
我要借给她两罐。
Once the oxygen content of the air had risen to 25% it was ready to burn.
一旦氧气在空气中的含量达到25%，它就要燃烧。