1.It is important/essential/ crucial/ significant for someone to do 对某人来说，做某事是重要的…… 例句： It is vital for human beings to take immediate action to protect wild animals. 对人类来说，立刻取措施保护野生动物至关重要。

2. There is little dou that.毫无疑问…… 例句： There is little dou that more and more people are moving from rural areas to large cities 毫无疑问，越爱越多的人，…。