哥哥或弟弟都是 Brother，通常如果有需要分别会用：Younger brother.
单词解析：
1、brother 读音：英 [ˈbrʌðə(r)] 美 [ˈbrʌðɚ]
释义：n.兄弟;同事，同胞;同志
int.（表示生气或吃惊）我的老兄！
复数： brothers
2、younger brother 读音： 英[ˈjʌŋgə(r) ˈbrʌðə(r)] 美['jʌŋɡər ˈbrʌðɚ]
释义：兄弟；弟；小弟；棣
例句：
1、Oh, so you're Peter's younger brother
哦，那么你是彼得的弟弟。
2、I have a younger brother.
我有一个弟弟。
扩展资料：
相关单词
1、elder brother 读音：英 [ˈeldə ˈbrʌðə] 美 [ˈɛldɚ ˈbrʌðɚ]
释义：哥;[法]兄长;昆
例句：He adored his elder brother.
他崇拜他的哥哥。
2、sibling 读音：英 [ˈsɪblɪŋ] 美 [ˈsɪblɪŋ]
释义：n.兄弟，姐妹;[生]同科，同属;[人]氏族成员
复数： siblings
例句：I have two brothers and a sister: three siblings in all.
我有两个哥哥和一个妹妹: 共有三个兄妹。
Brother
brother 英 [ˈbrʌðə(r)] 美 [ˈbrʌðɚ]
n. 兄弟（哥哥，弟弟）;同事，同胞;同志
int.（表示生气或吃惊）我的老兄！
复数： brothers
brother例句：
1、Oh, so you're Peter's younger brother
哦，那么你是彼得的弟弟。
《柯林斯高阶英汉双解学习词典》
2、He told reporters he'd come to be with his Latvian brothers.
他告诉记者他是来支持拉脱维亚同胞的。
《柯林斯高阶英汉双解学习词典》
3、I went to Brooks Brothers and bought myself a decent shirt.
我去布鲁克斯兄弟专卖店给自己买了一件体面的衬衫。
《柯林斯高阶英汉双解学习词典》
4、Have you got any brothers and sisters?
你有兄弟姐妹吗？
《柯林斯高阶英汉双解学习词典》
5、I have a younger brother.
我有一个弟弟。
《汉英大词典》
6、My brother quarrelled with my father.
我哥哥和父亲吵了一架。
《柯林斯高阶英汉双解学习词典》
7、She had a twin brother and a younger brother.
她有一个双胞胎哥哥和一个弟弟。
《柯林斯高阶英汉双解学习词典》
8、My brother's such a tease
我弟弟太喜欢戏弄人了。
《柯林斯高阶英汉双解学习词典》
9、My brother and I were alone with Vincent.
我和弟弟与文森特单独呆着。
《柯林斯高阶英汉双解学习词典》
10、He played with his younger brother.
他和弟弟一起玩。
《柯林斯高阶英汉双解学习词典》
11、I read your brother's obituary in the Times.
我在《泰晤士报》上看到了你哥哥的讣告。
《柯林斯高阶英汉双解学习词典》
12、She was betrothed to his brother.
她和他哥哥订了婚。
《柯林斯高阶英汉双解学习词典》
13、I can never tell him from his brother.
我总是分不清他和他的弟弟。
《汉英大词典》
14、The search for my brother widened
对我弟弟的搜索范围扩大了。
《柯林斯高阶英汉双解学习词典》
15、My brother had a lovely dog. I looked after him for about a week.
我哥哥有一只可爱的狗。我照看了它约一周。
《柯林斯高阶英汉双解学习词典》
16、I can remember the precise moment when my daughter came to see me and her new baby brother in hospital
我能清楚地回想起我女儿来医院看我和她刚出生的弟弟的那一刻。
《柯林斯高阶英汉双解学习词典》
17、I'm going to the hospital to see my brother.
我要上医院去看望我的哥哥。
《汉英大词典》
18、No wonder my brother wasn't feeling well
难怪我兄弟感觉不舒服了。
《柯林斯高阶英汉双解学习词典》
19、I have a rich brother and a lot of people envy the fact
我有个有钱的兄弟，很多人都因此羡慕我。
《柯林斯高阶英汉双解学习词典》
20、Tom is hardly distinguishable from his twin brother.
汤姆和他的孪生哥哥几乎令人分辨不出。
《汉英大词典》
21、Mother interposed in the dispute between my brother and me.
母亲介入了我与哥哥之间的争论。
《汉英大词典》
22、She led a normal, happy life with her sister and brother
她和弟弟妹妹一起过着平凡而幸福的生活。
《柯林斯高阶英汉双解学习词典》
23、He sacrificed his own career so that his avaricious brother could succeed.
他牺牲了自己的事业，这样他贪婪的弟弟才能成功。
《柯林斯高阶英汉双解学习词典》
24、The soldiers bantered with him as though he was a kid brother
士兵们把他当作弟弟一样和他开着玩笑。
《柯林斯高阶英汉双解学习词典》
25、She was called to her brother's bedside.
她被叫到了哥哥的病榻前。
《柯林斯高阶英汉双解学习词典》
26、His sons, brother and nephews were his armed sidekicks.
他的儿子、兄弟和侄子都是他的左膀右臂，都配备了武器。
《柯林斯高阶英汉双解学习词典》
27、He has always lived in the shadow of his brother.
他一直活在他哥哥的影子中。
《柯林斯高阶英汉双解学习词典》
28、Before we left the camp, my twin brother and I moulded a chair out of mud.
离开营地前，我和孪生弟弟用泥巴做了一把椅子。
《柯林斯高阶英汉双解学习词典》
29、My brother was still in his pyjamas.
我的兄弟还穿着睡衣裤。
《柯林斯高阶英汉双解学习词典》
30、I always played football with my older brother because I was good for my age.
我经常跟哥哥一起踢足球，因为就我的年龄而论我的球技还算不错。
《柯林斯高阶英汉双解学习词典》
本回答被网友采纳有不明白的地方再问哟，祝你学习进步，更上一层楼！
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Brother
通常如果有需要分别是哥哥还是弟弟会用
哥哥
Elder
brother
弟弟
Younger
brother
顺便一提
姐姐和妹妹也是一样
Sister
Elder
=年长
Younger
=
比较小的
兄弟姐妹
=
Slibing
brother,如果是哥哥呢，就是elder
brother
如不明白请追问，如果满意请【采纳】
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