Permag
清洁金属用粉
🗣️ 情景例句
Help! Help! I can't swim!
救命！ 救命！ 我不会游泳
During the two years since I took charge of the department.
在我负责这个部门的两年中。
Let's think carefully, I replied.
“让我们仔细想一想，”我答道。