Celcon
聚甲撑氧
🗣️ 情景例句
Congratulations, Michelle! That's something!
恭喜 ，Michelle！太好了！
I've been here for three weeks, and so far I've enjoyed it.
我已经在这里逗留了三个星期，到现在为止，我过得很好。
Many firms, for instance, have great difficulty in obtaining technical or scientific books from libraries
比如，很多公司向图书馆借阅科技书籍时感到很困难，