Shy, very fatal shortcoming.

害羞，很致命的缺点。

youdao

And the motor bicycle is not so expensive. When the young people ride it, we will become very cool, so a lot of people will ride it fast which is the fatal shortcoming.

当年轻人驾驶摩托车的时候，他们会变得非常的醋，所以很多的人都会骑的非常快，这是它的致命的缺点。

youdao

In the past, this shortcoming of traditional territorial defenses proved fatal to U.S. efforts to deploy them.

CENTERFORSECURITYPOLICY: Center for Security Policy | Showdown On SDI: Senate To Debate The Ultimate ��Killer Amendment��