合上的英文：
piece on

参考例句：

The little child folded her hands in prayer.
这个小孩合上双手祈祷。

The power that lies in the conjuncture of faith and fatherland (Conor Cruise O'Brien).
力量来源于对祖国和忠诚的结合上（康纳·克鲁斯·奥布赖恩）。

This onomatopoeic word suggests to me the sound a mousetrap makes when it snaps shut.
这个拟声词让我想起捕鼠夹子突然合上时的声音。

His eyes shut and he fell asleep.
他合上眼睛睡着了.

flap a book down hastily
急忙把书合上

Difficulties exist in the incorporation of the thermodynamic specifications
在与热动力学的结合上存在困难。

He had not wanted to smudge the creamy paper by shutting the book while the ink was wet.
他不愿在墨迹未干之前就合上本子弄污乳白的纸张。

When they are blown, one need only go to the service panel and turn the switch on again.
断电器跳开之后，只要到配电盘把它们合上就可以了。

The curtains are for purely decorative purposes and do not open or close.
那些窗帘纯粹是作装饰用的，不能拉开或合上。

The shark came in a rush and the old man hit him as he shut his jaws.
鲨鱼冲上前来，老人趁它合上两颚时给了它一下。

piece是什么意思：
n. 片，段；件，个；篇；硬币
v. 修补；填补；拼凑，缝合
adj. 计件的

a piece of flesh
娘儿们|女人|人

A piece of cake
小事一桩

Then It'started to break into pieces. These pieces started to move apart.
然后它开始分为很多块。这些分开的板块开始移动，分开。

How do you finger this piece?
这段曲子怎么弹？

This piece of cloth has a new design.
这布图案新颖。