I never told you that, because those 3 words are my last defence.

我从没跟你说过：因为那三个字是我为自己做的最后的辩护。

youdao

This can render powerful antibiotics, which are often the last defence against multi-resistant strains of bacteria, ineffective.

这一情况可使强力抗菌素失效，而强力抗菌素常常是针对耐多药菌株的最后一道防线。

youdao

Their defence, so strong last season, has now conceded 12 goals in six games.

上个赛季他们的防守队员很强，但现在已经在六场比赛中丢失了12个球。

《柯林斯英汉双解大词典》

They see the armed forces as the guarantor of secularism and the last defence against the rise of fundamentalism.

ECONOMIST: Egypt��s president

Australia's last defence white paper was in 2009.

BBC: Australian Prime Minister Julia Gillard

EADS, admits there is some attraction in getting closer to France's Thomson defence-electronics group, the last unaligned defence company of any significance in Europe.

ECONOMIST: European aerospace