1.refer to 涉及；指的是

By way of illustration I'll refer to the behavior of rabbits.
我將舉例說明兔子的行為。

The new law does not refer to land used for farming.
那條新法律并不涉及耕種用地。

2.because of 因為，由于

He was not a particularly good shot because of his eyesight.
他視力不好，算不上是一個出色的射手。

The man was known to the police because of previous convictions.
因為有犯罪前科，警察們都認(rèn)識這個人。

3.at least 至少；最低限度

Try to eat at least four slices of bread a day.
每天盡量至少吃4片面包。

At least three British golf courses are now owned by the Japanese.
現(xiàn)在英國至少有3家高爾夫球場為日本人所有。

4.suppose to 認(rèn)為是

There's nothing to keep us here, is there?I suppose not.
這里沒有什么讓我們留戀的，對吧？我想沒有。

Some, I suppose, might even be in positions to influence opinion.
有的人，我認(rèn)為，甚至有可能影響輿論。