Pentavalency
五价
🗣️ 情景例句
Thank you.
谢谢。
Please lend an ear to this man's important news.
请注意倾听有关这个男人的重大新闻。
Experts believe that there are about 40,000 different types of job in the world. Choosing the right one is a difficult job in itself.
专家们认为世界上大约有4万个不同种类的工作。要从中选择一个适合自己的工作是很困难的。