Wattful
有功的, 与电压同相的
🗣️ 情景例句
I'm sorry, I really don't know.
对不起，我真的不知道。
He who is afraid of asking is ashamed of learning.
害怕问者耻于学。
Such extreme cases must probably be taken with a grain of salt,
这种极端的事例虽不可全信，