Pentavalency
五价
🗣️ 情景例句
I think she has a stomachache.
我想她肚子痛。
For a lost thing care nothing.
一事之失，不必介意。
Last year we helped them with the orange-picking.We really enjoyed working on the farm.
去年我们帮他们搞苹果。我们实在太喜欢在农场干活了。