He said it should be by choice.

应该自愿的。

" I played a part, though not by choice" .

" 我也有责任，虽然我身不由己。"

Why would we do it to ourselves by choice? !

什么我们会选择样对自己？！

But he was the first who ever did so by choice, out of principle.

但确实第一个自愿么做的人，出于自己做人的原则而已。

Okay, I'm not here by choice.

我来里并非自愿。

Don't you dare say I'm in here by choice.

别什么入狱我自己的选择。

To refrain means that you stop yourself from doing something by choice.

“To refrain”指你自愿地阻止自己做某事。

By choice, he has no electricity, no gas, and no indoor plumbing.

选择不使用电、煤气，也不安装室内管道。

So, no, this is about fairness to the people who are childless by choice, okay?

所以，抱歉，我要对没有孩子的人公平，好么？

Unlike in high school and most of college, by choice. - Where's the opener?

跟在高中和大学时不一样，你们主动来的。 - 开瓶器在哪里？

Some students were more active than others but I suppose they were there by choice.

一些学生可能比其学生积极，不过我认那因们自己选择去那里学习的。

To have children by choice rather than chance is a matter of autonomy and dignity.

依靠选择，而非计划之外的怀孕，一个关乎自主和尊严的问题。

I have only a handful of highly meaningful relationships in my life and it is by choice.

我一生中只有少数非常有意义的关系，而我的选择。

I am an optimist by choice as much as by nature. Sure, I know that sorrow exists.

我乐天派，既天生如此，也因后天选择所致。诚然，我知道生命中会有伤痛。

My mom, Nellie Ruth Pills-bury King, was one of America's early liberated women, but not by choice.

我的妈妈奈丽·露丝·皮尔斯伯里·金美国最早的妇女解放分子之一，却并非出于自愿。

It found that people tend to feel happier if they help others, but if they do so by choice.

研究发现，如果人们愿意帮助人，而且出于自愿，们往往会感到更快乐。

You know I wouldn't leave by choice, but it's time to draw a curtain over the past few months.

你知道我不愿离开的，但过去几个月的事该拉下帷幕了。

By choice, she asked could she big chop.

根据选择，她问她能不能大排档。

I'm 35 and I'm single by choice.

我今年 35 岁， 自愿单身。

I am an optimist by choice as much as by nature.

我天生就一个乐观主义者。