例句：
I found a mistake in that sentence.
我發現那個句子有一個錯誤。
You've made several grammatical mistakes in the composition.
你的作文中犯了幾處語法錯誤。
They made the big mistake of thinking they could seize its border with a relatively small force.
他們大錯特錯，居然認為以較少的兵力就能夠奪取其邊境地區。