Permolybdate
过钼酸盐
🗣️ 情景例句
She is making steady progress in her learning.
她在学习中不断进步。
You two don't have much contact
？ 你们俩没怎么联系吗？
Mr and Mrs Shute were very sad. But what could they do?
舒特先生和夫人非常难过。但他们有什么办法呢？