U-test
u检验
🧩 词语组成解析
🗣️ 情景例句
We get our friends to roll their sleeves up and get to work.
我们召集我们的朋友共同卷起袖子来做。
Why didn't you contact me?
为什么你不和我联系？
What happened before printing was invented?
印刷术发明以前是怎么一回事？