Lacking leadership, they could organize no defence against their oppressors.

没有人领导，他们就无法组织起来反抗压迫者。

《柯林斯英汉双解大词典》

The accused made no defence.

被告没有进行辩护。

youdao

There is no defence, except stupidity, against the impact of anew idea.

除了愚蠢，对新思想的影响别无防御之法。

youdao

'Sometimes it can hurt, but to say you're small is no defence if you've infringed a patent.

BBC: Do the patent wars threaten innovation?

However, there is still a small risk that shares will perform poorly for several decades, against which youth offers no defence.

ECONOMIST: Will investors run for cover?

If a Nobel prize is no defence against expropriation, that doesn't bode well for the security of property rights in Bangladesh.

ECONOMIST: Property rights in peril in Bangladesh