Contravalid
反有效的, 无效的
🗣️ 情景例句
Would two o'clock be acceptable?
两点钟合适吗？
Saying is one thing, and doing another.
说是一回事，做是另一回事。
Some years ago an American psychiatrist named William Dement published experiments dealing with the recording of eye-movements during sleep.
前些年，美国一位精神病学者发表了一篇报告，报告中记录了眼球在睡眠时的活动情况。