1.表述：work like a dog
釋義：To work very hard. （拼命工作）
例句：I've been out here working like a dog while you sit inside sipping lemonade. Can you maybe lend a hand?
I worked like a dog all summer to earn enough cash to buy my guitar, and it was all worth it.
He must work like a dog in order to support his large family.
Their boss pays the highest wages, but he wants his pound of flesh in return and makes them work like a dog.
2. 表述：let sleeping dog lies
釋義：To leave a situation alone so as to avoid worsening it.（莫惹是生非，別惹麻煩）
例句：Jill: Should I ask the boss if he's upset at my coming in late in the mornings?
Jane: If he hasn't said anything about it, just let sleeping dogs lie.
I thought I would ask Jill if she wanted me to pay her back right away, but then I decided to let sleeping dogs lie.
Oh, don't mention that fight they had months ago—let sleeping dogs lie!