to stay clean

• 保持干净

to stay clean的用法和样例：

例句

1. We should keep our cla room clean.
   我们应使我们的教室保持干净。
2. The lotus has also appealed to scientists for its ability to resist water and stay clean.
   荷同时还吸引着科学家来研究它防水和保持干净的特性。