Cagd
计算机辅助几何设计
🗣️ 情景例句
and how hard it is
他还说这件事很难
What's matter with you?
你有什么问题吗？
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。