Variopter
(滑动)光学计算尺
🗣️ 情景例句
Her eyes look so sad.
她的目光那么忧郁。
What is the highest mountain in this country?
这个国家最高的山是什么？
After that they pressed a piece of paper on top, and printed a whole page of a book.
然后，再把一张纸压在上面，就印出了一整页书。