弟弟英语写是brother.
brother:n.兄弟;(同父母的)兄,弟;(称男性的共事者或同道)同事,弟兄,伙伴;(同一宗教团体的男性)教友;(尤指)修士。
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My brother was always getting me into trouble with my parents.
以前我弟弟经常连累我遭父母的责难。
She split the money she won with her brother.
她把得到的钱与弟弟分了。
I got it off of my brother.
这是我从我弟弟那里弄到的。
My little brothers are always fighting.
我的小弟弟们总在打架。
He was still mourning his brother's death.
他仍然在为哥哥的去世而悲伤。
He was not so quick a learner as his brother.
他学东西不像他哥哥那么快。