They have an effect on how we feel about a character or a moment.

他们会对我们感受一个角色或是一个瞬间有影响

A study reported last fall suggests that having a pet dog not only raises your spirits but may also have an effect on your eating habits.

去年秋天的一项研究表明，养一只宠物狗不仅能振奋你的精神状态，还可能影响你的饮食习惯。

Does television have an effect on children's behaviour?

电视对孩子的行为有影响吗？

This may have an effect on food prices.

这将会对食品价格有所影响。

To affect a policy is to have an effect on it.

影响一项政策就是对该政策具有一种影响。

What you say or do will have an effect on others.

你所说或所做的每一件事都会对别人产生影响。