fault

The car accident was my fault because I didn't see the red light.

(Chinese) 那场车祸是我的错，因为我没看到红灯。

It isn't your fault that the machine broke; it was already very old.

(Chinese) 机器坏了不是你的错，它本来就已经很旧了。

California's San Andreas Fault is a major source of earthquake activity.

(Chinese) 加利福尼亚州的圣安德烈亚斯断层是地震活动的主要来源。

Geologists study faults to understand how the earth's plates are moving.

(Chinese) 地质学家研究断层以了解地球板块是如何运动的。