for the reason that 因为 I did it because he told me to. 是他吩咐我才做的。 Just because I don't complain, people think I'm satisfied. 就因为我不发牢骚，大家便以为我满意了。 Because it was so late, he found it unacceptable to send them all away. 因为太晚了，他觉得把他们都送走是不可接受的。
Word OriginMiddle English: from the phrase by cause, influenced by Old French par cause de ‘by reason of’.
Express Yourself Giving reasons, justifying a choice对选择作出解释 在各种考试中需要作出选择并给出理由，在谈话或会议上需要对决定加以解释，可用以下表达方式：
There are two main reasons why I think it’s the best option: first, there's the cost and second, the quality. 我认为这是最好的选择，主要原因有两个：第一是成本，第二是质量。
I think/believe it's the right thing to do because it gives everyone a fair chance. 我认为这么做是正确的，因为这给予每个人公平的机会。
I would choose the newer one on the grounds that it will last longer. 我会选择较新的那个，因为它更加耐用。
Of the three houses, the largest one seems to me to be the best, because they need the room. 这三栋房子中，最大的那栋在我看来是最好的，因为他们需要这么大的空间。
My choice would be number 3, simply because it's the clearest design. 我的选择是 3 号，原因就在于它的设计最清晰。