a piece of

a piece of laboratory apparatus

一件实验室仪器

There was a piece of cloth tied to the dog's collar.

狗项圈上系着一条布。

Getting rid of him will be a piece of cake.

摆脱掉他就是小事一桩。

How very thoughtless. I'll give him a piece of my mind.

真是太没头脑了，我要告诉他我很生气。

Mr. Long was now cutting himself a piece of the pink cake.

朗先生正在给自己切一块粉色蛋糕。

Strain the juice through a piece of gauze or a sieve.

用一块纱布或过滤网将果汁过滤一下。

He hunted vainly through his pockets for a piece of paper.

他翻遍口袋想找一张纸，结果没找到。

He ticked off my name on a piece of paper.

他在一张纸上我的名字旁打了钩。

They ceremoniously cut a piece of ribbon, declaring the exhibition open.

他们郑重其事地剪彩，宣布展览开幕。

A powerful electric current is passed through a piece of graphite.

给一块石墨通入强电流。

A piece of china crunched under my foot.

我踩碎了一块瓷片。

It was just a piece of play-acting.

它只是一种作秀而已。

Just slip in a piece of paper.

只要塞进一张纸就行。

a piece of bent wire

一段弯曲的金属丝

a piece of bread and butter

一块黄油面包