Valid argument
[计] 有效论证
🧩 词语组成解析
🗣️ 情景例句
You are twenty-one, a grown-up young lady old enough to make up your own mind.
你已经21岁了，已经到了可以自己做主的年龄了。
He has a pair of shoes.
他有一双鞋。
At the moment, he's reading an interesting book.
此刻，他正在看一本有趣的书。