Cationic aceivation
[建] 阳离子活化(作用)
🧩 词语组成解析
[医] 阳离子的, 阴向离子的
🗣️ 情景例句
What books are required for this class?
这课需要什么样的书？
It's hard to say.
难说。
How are you doing?
你好吗？