They missed a good chance.他们错过了一次很好的机会.
He has a cold ,because he has a fever.他感冒了,因为他正在发烧.
The doctor is very famous he heals many people of dieases.这个医生很出名,他治愈了很多病人.
we must follow the rules.我们必须遵守规格.
we should keep the balance of nature.我们应该保持生态平衡.
希望能帮到您.