You wrecked it purposely. 你故意打烂了它. He's such a klutz. 他很笨拙.
Little mistakes lead to big ones. 一失足成千古恨. 小失误会铸成大错. Why are you covering his ass? 你何必掩护他的过错呢? I assume it's an error? 我想这是个错误吧? I'd like some explanation. 你解释一下, 这是怎么回事.
What's your story? 你有什么辩解?
