•How can we defend our homeland if we don't have an army?如果没有军队，我们怎能保护我们的家园？

•White blood cells help defend the body against infection.白细胞有助于保护身体免受感染。

•They are fighting to defend their beliefs/interests/rights.他们在为为捍卫自己的信仰／利益／权利而战。

•He vigorously defended his point of view.他极力为自己的观点辩护。

•The Bank of England intervened this morning to defend the pound (= stop it from losing value).今晨，英格兰银行为防止英镑贬值采取了干预措施。

•The Prime Minister was asked how he could defend (= explain his support for) a policy that increased unemployment.首相被问及为甚么他竟然会支持导致失业率上升的政策。

•He will be defending (= trying not to lose) his title at the European Championships next week.他将在下周的欧洲冠军赛中争取卫冕。

•[R] I'm going to karate lessons to learn how to defend myself.我要去参加空手道训练班，学习如何自我防卫。

•I can't afford a lawyer so I shall defend myself (= argue my own case in a law court).我请不起律师，所以我将在法庭上自辩。

•He will defend his 1500m title at the weekend.他会在周末1500米比赛中争取卫冕。

•The defending champion will play her first match of the tournament tomorrow.卫冕冠军将在明天进行她在此次锦标赛中的第一场比赛。

•In the last ten minutes of the match, we needed to defend.我们需要在比赛的最后十分钟内进行防守。