上头的英文：
above
on top of
on the surface of

参考例句：

The mast below the topgallant mast in a square - rigged ship and highest in a fore - and - aft - rigged ship.
中桅在纵帆装船的紧挨下桅上头的中桅，而在横帆装船上则指在上桅之上的桅

The crows above the forest are calling.
乌鸦树林上头啼叫。

- with his handwriting?
-上头却有着他的笔迹呢?

The shelf began to buckle because I put too many books on it.
这架子开始弯曲，因为我放太多书在上头。

It's this habit of worrying that's made her ill.
这病就是打这个秉性上头思虑出来的.

Toxic gases in the air such as car exhaust, are adsorbed onto it, so I don' t breath so much of it in.
空气中的有毒气体，比如汽车废气可以被吸附在上头，这样我就不会吸进去那么多有毒气体了。

Forty-eight slivers form the breaker-drawing unit are combined to form the lap in the lapper for the comber.
在成卷机上头道并条机的48根棉条并合在一起制成精梳机所需要的棉条。

surface是什么意思：
n. 表面；表层；面；顶面；操作台
v. 升到水面；露面；醒来；铺设

impress a mark on [ upon ] a surface=impress a surface with a mark
在表面上打记号

He finally surfaced at midday.
他终于在中午时醒过来了。

The towers are surfaced with steel plates.
在塔面上加了一层钢板。

An extremity of a solid is a surface.
立体的边界之一是一个面。

top surface of coal bed
煤层顶面等高线图