Nonofficial
a. 非正式的
✅ 同义词
🗣️ 情景例句
Well, you can write to her.
嗯，你可以写信给她。
Jack of all trades is of no trade.
万事皆通，一无所长。
Advertisers discovered years ago that all of us love to get something for nothing.
做广告的人们多年前就发现我们大家都喜欢免费得到东西。