英汉词典

1. （说明原因）因为，由于
    You use because when stating the reason for something.

because

    e.g. He is called Mitch, because his name is Mitchell...
           人们叫他米奇，因为他大名叫米切尔。
    e.g. Because it is an area of outstanding natural beauty, you can't build on it...
           考虑到这一带自然风光旖旎，你不能建在这里。

2. （作出解释）因为
    You use because when stating the explanation for a statement you have just made.

    e.g. Maybe they just didn't want to ask too many questions, because they rented us a room without even asking to see our papers...
           也许他们只是懒得问太多的问题，因为他们都没要求看我们的证件就把一个房间租给我们了。
    e.g. The President has played a shrewd diplomatic game because from the outset he called for direct talks with the United States...
           总统玩了一场高明的外交游戏，因为从一开始他就要求和美国直接对话。

3. 因为；由于
    If an event or situation occurs because of something, that thing is the reason or cause.

    e.g. Many families break up because of a lack of money...
           许多家庭由于缺钱而破裂。
    e.g. Because of the law in Ireland, we had to work out a way of getting her over to Britain.
           由于爱尔兰的法律所限，我们不得不想办法把她弄到英国去。

4. 仅仅因为
    You use just because when you want to say that a particular situation should not necessarily make you come to a particular conclusion.

because

    e.g. Just because it has a good tune does not mean it is great music...
           仅凭旋律优美并不见得就是一首杰出的音乐作品。
    e.g. Just because something has always been done a certain way does not make it right.
           仅仅因为老是以某种方式做事并不意味着这么做就是对的。