return即为返回，所以back是多余的。这句话还可以 表述为： My friends went back to their second home town.
［误］ My friends returned back to their second home town .
［正］ My friends returned to their second home town.
［析］ return即为返回，所以back是多余的。这句话还可以 表述为： My friends went back to their second home town.
单词：second的近义词、反义词、形近词辨析
first/fist/second/third/initial/initially/origin/original/originate
记忆：
1. first [ fE:st ] adv. 首先, 最初, 第一(列举条目等用) adj. 第一的 The first settlers on the island had great difficulty in getting used to the poor conditions.早期的殖民者很难适应岛上的恶劣条件。 格言：First things first.有序而作。
2. fist [ fist ] n. 拳 His fist hit her in the face hard.他的拳头重重地打在她的脸上。
3. second [ 5sekEnd ] n. 秒, 第二人 num.第二 vt. 赞成, 支持 After a few seconds everything quieted down.过了一会儿，一切都平静了下来。
4. third [ WE:d] num.第三, 三分之一 I will see the film a third time because I still didn’t quite understand it at the second time.我第二遍也不是很明白这部电影，因此我又看了一遍。
5. initial [ i5niFEl] in-it-ial Of, relating to, or occurring at the beginning; first adj.最初的, 词首的, 初始的 Both sides took the initial step toward peace.双方都朝着和平方向迈出了第一步。
6. initially [I5nIFElI] adv. 最初, 开头 Initially, she opposed the plan, but later she changed her mind.起初，她反对这份计划，但后来她改变了主意。
7. origin [ 5CridVin ] The point at which something comes into existence or from which it derives or is derived n. 起源 Everything has its origin.万物有其起源。
8. original [ E5ridVEnEl ] adj. 起源的，原始的 Not only our products but also our minds are original.我们的产品是原创的，我们的思想也是原创的。
9. originate [ E5ridVineit] v. 起源于 Planes originated from birds.飞机起源于鸟的启示。
另类阅读：
Can we allow the fist to decide who is the first, second or the third?
与单词：second 相关的例句或者名人名言
It takes one second to say "I do", but a lifetime to prove it.
说一句“我愿意”只用一秒，证明它却需要一辈子。
Light Rail started Batongxian Tong state can become a second Small?
轻轨八通线开工通州能否成为第二个回龙观？
He discharged his second arrow.
他抽出第二枝箭。
VERB. （在数量上）压倒，比…多. If one group of people or things outnumbers another, the first group has more people or things in it than the second group.
English is my second language.
英文是我的第二语言.
※Wherever in the world a people knows desperate want, there must appear at least the spark of hope, the hope of progress--or there will surely rise at last the flames of conflict.——Dwight Eisenhower,Commander in chief of the Allied forces in the second World War 任何地方，一个民族只要知道自己迫切需要什么，那里就会出现希望的火花，出现进步的希望，换句话说，最后必定会燃起抗争的火焰。第二次世界大战中盟军最高司令 艾森豪威尔，D.
※A friend is a second self. 朋友是另一个我。
※In war, there is no second prize for the runner-up.——Omar Bradley, Aerican general 在战争中，第二名是没有奖的。美国将军 布拉德利 O.
※Custom is a second nature. 习惯是第二天性。
