我想证明一下这样的事情不会发生第二次，于是我又坚持着把右腋的毛剃了。

I wondered whether or not it would be safe to shave my right armpit, then reasoned that it couldn't possibly happen twice.

youdao

妃子答应了，条件是拿齐国那一件天下无双的狐白裘(用白色狐腋的皮毛做成的皮衣)做报酬。

The concubine promised to help if she could have the unique white fox fur coat of the State of Qi as her reward.

youdao

事故后我用了六个月的腋杖。

After the accident I spent six months on crutches.

《牛津词典》