She taught her younger brother how to play piko.

她教她的弟弟如何玩piko（动作游戏）。

She always tries to protect her younger brother.

她总是试图保护她的弟弟。

She loves to play bopeep with her younger brother.

她喜欢和她的弟弟玩捉迷藏。

She didn't want to be outdone by her younger brother.

她不想被她的弟弟超过。

She loves to retell her favorite fairy tales to her younger brother.

她喜欢给她的弟弟复述她最喜欢的童话故事。

She called her younger brother a brat after he broke her favorite vase.

她称她的弟弟为顽皮的小孩，因为他打破了她最喜欢的花瓶。

Her younger brother is very mischievous, always making her laugh and cry.

她的弟弟非常调皮捣蛋，总是让她哭笑不得。

Her younger brother is a little rascal who always plays pranks.

她的弟弟是个小调皮鬼，总是搞恶作剧。

She found her younger brother quite persuasible when she needed help.

她发现她的弟弟在她需要帮助时非常易受说服的。

She spent the afternoon ponying her younger brother with his homework.

她花了整个下午提供帮助她弟弟做作业。