She runs the business by herself.

她自己经营这项生意。

She got a seat by herself.

她自己找了个座位。

Molly was happy because she solved her problem all by herself!

莫莉很高兴，因为她自己解决了问题！

She did homework by herself.

她自己做的作业。

Let her choose by herself!

让她自己来选择吧！

It has always been my custom to get in a car first, and let the woman get in by herself.

我的习惯是先上车，再让女士自己上车。

Whenever she had problems, she would either solve them by herself or ask teachers for help.

每当她遇到问题，她要么自己解决，要么向老师寻求帮助。

Instead of giving her money to buy the toy, Taylor's father encouraged her to make money by herself.

泰勒的父亲没有给她钱去买玩具，而是鼓励她自己去赚钱。

Having one's own bedroom even as an infant, fixes in a person the notion that she is entitled to a place of her own where she can be by herself, and keep her possessions.

（美国人）甚至在婴儿时期就拥有自己的卧室，这会使人产生这样一种观念：她有权拥有一个属于她自己的地方，在那里她可以独处、可以保存她的物品。

She lives by herself.

她独自一人生活。

She learned it by herself.

她是自学的。

She likes to work by herself.

她喜欢自己工作。

Don't leave her at home by herself.

不要把她一个人留在家里。

My sister learned to skate by herself.

我姐姐自学滑冰。

She traveled throughout the Middle East by herself.

她一个人游遍了中东。

She can make a cake by herself without help.

她不用别人帮忙就能自己做出蛋糕。

At weekends, my sister often learns English by herself.

我妹妹经常在周末自学英语。

It's said that Tina will go to Canada by herself.

据说蒂娜将独自去加拿大。

Grandma sat all by herself in the corner of the room.

奶奶一个人坐在房间的角落里。

Lucy has learned to manage time by herself since last term.

自从上学期以来，露西已经学会了自己管理时间。

My grandma can use WeChat. She learns it all by herself.

我奶奶会用微信。她完全是自学的。

My mother made some zongzi by herself on the Dragon Boat Festival.

我妈妈在端午节时自己包了一些粽子。

Jessie cooked a meal for her big family by herself on New Year's Eve.

杰茜在新年前夕亲自为她的大家庭做了一顿饭。

She by herself got up and down her bed, walked to the bedroom door and opened it.

她一个人在床上爬上爬下，走到卧室门口，打开了门。

She always learned more about these topics when she was by herself, so no one could find out about this.

她总是在独自一个人时才学习她感兴趣的这些内容，所以没有人知道这件事。

While riding his bike home on a cold night, he came across a sad-looking elderly woman wandering the streets by herself.

在一个寒冷的夜晚，当他骑着自行车回家时，他遇到了一位看起来悲伤的老妇人独自在街上游荡。

She had split up with her husband the week before, was living in a flat by herself, and since she'd found it too much to cope with, she'd taken it out on other people.

她一周前和丈夫分居，一个人住在一套公寓里，因为她觉得受不了了，就把气撒在别人身上。

It was reported that she waited for her friend to catch up for about 5-6 hours so that they could cross the finishing line together, but this year she took part in the marathon by herself, and chose the longest distance.

据悉，为了和朋友一起冲过终点线，她等了5-6个小时，但今年她独自参加了马拉松比赛，并选择了最长的距离。

She began to make cakes by herself.

她开始自己做蛋糕。

She can't wash her face by herself.

她还不会自己洗脸。