后头的英文：
the area in back of sth
later in time

参考例句：

Stepping into the porch he doffed his hat, took the card from his pocket and tucked it again behind the leather headband
边迈进门廊，边摘下帽子，并且从兜里取出名片，塞回到鞣皮帽圈后头。

He dragged his injured foot behind him.
他在后头拖着伤脚行进。

You go before and I will follow after
你先走，我跟在后头。

The player with a kiss-me-quick on her head is my girl friend.
后头戴着罩帽的那个演员是我的女朋友。

They could all walk and run and climb our heads off, even when they were seventy
哪怕年届七十，不管是走是跑还是翻山越岭，他们都会把我们远远甩在后头。

Even if this step is worthy of pride, it is comparatively tiny; what will be more worthy of pride is yet to come
如果这一步也值得骄傲，那是比较渺小的，更值得骄傲的还在后头。

When the meager purchases had been placed into a plastic bag,something remarkable happened.
当这少量的几件商品被装入到一个塑料袋里后，更引人注目的事还在后头。

When we later walked down the main street of the village, we were followed by a silent procession of children.
后来，我们在村里的主要街道上行走的时候，一队默不作声的孩子跟在我们后头

“Well,” he said, “if I was walking down the street behind you, I should say, “Doesn’t that little person fancy herself!”
“咳，”他说，“要是在街上，我走在你后头，我准说:啊，这小女人自以为很帅呢。”

area是什么意思：
n. 面积；地区；区域；场地；领域，范围，方面

This is a drainage area.
这里是排水区。

The areas of greater rainfall conform roughly with these forested areas.
降雨量较大地区大致与这些森林地区相符合。

The?penalty area?is the rectangular area in front of the goal.
禁区就是指球门前的矩形区域。

back是什么意思：
n. 后面，背面，反面；背，背部；靠背；后卫
v. 支持；后退，倒退；背书；下赌注于
adj. 背部的；后面的；过去的；拖欠的.
adv. 以前；向后地；来回地；上溯

Stand back to back!
背靠背站好！

They are on the back of the menu.
它们在菜单背面。

Our seats on the train were back to back.
我们在火车上的坐位是背靠背的。

sth是什么意思：
abbr. something的缩略词

average sth out(at sth);calculate the average of sth
算出某事物的平均数

be agreeable to sth
欣然同意某事

at/on the altar of sth
因为，为了（值得为之受苦的事）