for the reason that 因爲 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. 就因爲我不發牢騷，大家便以爲我滿意了。 Because it was so late, he found it unacceptable to send them all away. 因爲太晚了，他覺得把他們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對選擇作出解釋 在各種考試中需要作出選擇並給出理由，在談話或會議上需要對決定加以解釋，可用以下表達方式：
There are two main reasons why I think it’s the best option: first, there's the cost and second, the quality. 我認爲這是最好的選擇，主要原因有兩個：第一是成本，第二是質量。
I think/believe it's the right thing to do because it gives everyone a fair chance. 我認爲這麽做是正確的，因爲這給予每個人公平的機會。
I would choose the newer one on the grounds that it will last longer. 我會選擇較新的那個，因爲它更加耐用。
Of the three houses, the largest one seems to me to be the best, because they need the room. 這三棟房子中，最大的那棟在我看來是最好的，因爲他們需要這麽大的空間。
My choice would be number 3, simply because it's the clearest design. 我的選擇是 3 號，原因就在於它的設計最清晰。