People all around the nation were thrilled upon the return of the astronauts.为什么the return of 要 用 return?为什么不用back?

People all around the nation were thrilled upon the return of the astronauts.为什么the return of 要 用 return?为什么不用back?
People all around the nation were thrilled upon the return of the astronauts.
为什么the return of 要 用 return?为什么不用back?

People all around the nation were thrilled upon the return of the astronauts.为什么the return of 要 用 return?为什么不用back?
不及物动词 vi.
1.回,返回,归[(+to/from)]
She did not return home till eleven o'clock.
她十一点钟才回家.
2.重新发生;回复,恢复[(+to)]
The situation has returned to normal in the capital.
首都的局势已恢复正常.
3.归还,退回[(+to)]
4.回答;反驳
及物动词 vt.
1.还,归还;送回[(+to)][O1]
Have you returned the novel to the library?
那本小说你还给图书馆了吗?
2.回答,回报;报答
We decided to return blow for blow.
我们决定以牙还牙.
3.选举,选出[(+to)]
4.【律】(陪审团)正式宣布(裁决)
5.获得,产生(利润等)
The performance returned $2,000 over expenses.
这场演出除去开支赢余二千元.
6.报告;申报
7.反射(光、声等)
8.回答说;反驳道
名词 n.
1.回,归,返回[C][U][(+from/to)]
On his return he reported his findings to the committee.
他一回来就向委员会报告调查结果.
2.还,归还[U]
3.回答;报答[U][C]
He expected no return when he decided to give us full support.
他决定全力支持我们时并无图报之意.
4.回复;复发;恢复;再现[U][C]
She had a return of the heart attacks.
她心脏病又发作了.
5.收益,利润;利息[P1]
6.报告书;申报;报表[C]
7.【英】来回票[C]
8.退货[P]
形容词 a.
1.返回的,回程的;来回的
2.报答的;回报的
The professor paid a return visit to his American colleague.
教授回访了美国同事.
3.返回的,折回的
名词 n.
1.背脊,背部[C]
Someone patted me on the back.
有人在我背上轻轻地拍了一下.
2.后部[the S][(+of)]
Grandpa and grandma sat in the back of the car.
爷爷和奶奶坐在汽车后排的座位上.
3.后面,背面[the S][(+of)]
4.椅背[the S] [(+of)]
5.(书报等的)末尾[the S][(+of)]
There is an appendix at the back of the book.
该书末尾处有一附录.
6.(足球等的)后卫;后卫球员[C][U]
副词 ad.
1.在原处;回原处
Joan and I walked back to the college.
我和琼步行回到学校.
2.向后;后退地
Please go back three steps.
请退后三步.
3.以前;追溯
A few years back you could see nothing but barren land there.
数年前人们在那儿所能看到的只是荒野.
4.回复;还;往回
5.止住;延缓
形容词 a.[Z]
1.后面的,后部的
He sat in the back seat of the car.
他坐在车子后面的座位上.
2.拖欠的,到期未付的
3.过去的;过期的
I bought some back issues of science magazines yesterday.
昨天我买了几本过期的科学杂志.
4.【语】舌根音的
5.偏僻的
6.向后的
及物动词 vt.
1.使倒退;使后退
She backed her car out of the garage.
她从车库倒车出来.
2.支持;援助;赞助
A lot of my friends backed my plan.
许多朋友支持我的计划.
3.(赛马等)下赌注于;打赌
4.裱褙;给...加衬里[(+with)]
5.背书(支票等)
John backed the check immediately.
约翰立即背书这张支票.
不及物动词 vi.
1.倒退;后退
On seeing the dog,she backed away.
一见到狗,她便向后退去.
2.【海】(风)逆时针转向

back做名词没有回归的意思。
return可表回归。比如好多电影名是the return of 什么什么。指环王的王者归来the return of the king 就是一例。

这里的return是名词，句意为“全国各地的人们为宇航员的归来欢欣鼓舞。”可替换为coming back.back做名词意思只能是“后背、后面”。