Discuss pollution with your child, emphasizing how nice a clean street, lawn, or park looks.
和孩子讨论污染问题，强调清洁的街道、草地或公园有多么美丽。
Kitchens that are not kept clean may be closed for use.
未保持清洁的厨房可能会停止使用。
I'm always having to clean up after the children.
孩子们离开以后，我总得打扫一番。
I dare say that the computer would provide a clear answer to that
想必计算机能就其给出一个清楚的答案。
Whatever its obscurities, the poem was clear on at least one count.
这首诗再怎么晦涩，至少有一点是清楚的。
It is not clear what they want us to do.
我们不肯定他们要我们做什么。