Rappel
n. 绕绳下降
🗣️ 情景例句
Let's have a talk about it in advance.
我们事先商量一下。
They that sow in tears shall reap in joy.
泪水汪汪播种，得意洋洋收获。
Two factors weigh heavily against the effectiveness of scientific research in industry.
两个因素严重地影响工业里科学研究的效果：