I came to spend some time with my favorite nephew.
我来是为了和我心爱的侄儿相聚一些时间。
You should wear a sweater, It's cold today.
你应该穿一件毛衣,因为今天很冷。
Some of the bigger firms are engaged in researches which are of such general and fundamental nature that it is a positive advantage to them not to keep them secret.