Contravalid
反有效的, 无效的
🗣️ 情景例句
We were most impressed with your efficiency.
你的工作效率很高，我们极为钦佩。
Who is the governor of this state?
这个州的州长是谁？
1 Make a list of 10 things which you like doing most.
1。列出一张你最喜欢做的10件事情的清单。