A common way to explain causes in Chinese is with "因为"(yīnwèi). This is almost entirely equivalent to "because" in English. Usually "因为"will begin a new phrase in a sentence.

Structure:
In this structure, we first state the result, and then give the reason in the next statement after the "因为".

Examples:

Wǒ bú xǐhuɑn hànzì, yīnwèi hěn nán jì.
我 不 喜欢 汉字，因为 很 难 记。
I don't like Chinese characters because they are hard to remember.

Wǒ bú jìdé zuótiān de shìqínɡ, yīnwèi wǒ hē le tàiduō píjiǔ.
我 不 记得 昨天 的 事情，因为 我 喝 了 太多 啤酒。
I don't remember what happened yesterday because I drank too much beer.