好吧，给你的三明治加一片奶酪。

Well, have a slice of cheese for your sandwich.

他从冰箱里拿了一片奶酪。

He took a slc of cheese from the fridge.

我喜欢在晚餐后吃一片奶酪蛋糕。

I love to have a slice of cheesecake after dinner.

请给我一片奶酪。

Please give me a slice of cheese.