Cobaltinitrite
亚硝酸根合高钴酸盐
🗣️ 情景例句
Mary and Arnold are going steady.
玛丽和阿诺德正式成为情侣。
What do you do?
你是做什么的？
I think so. But he seemed rather tired last night.
我想睡得好。但昨晚他看起来有点累。