1.defend第一层意思=protect against a challenge or attack=guard(保卫)
1.1单身女性有必要报个跆拳道班,学习下如何defend themselves(自卫)
1.2 伊斯兰的极端分子宣称他们are fighting to defend their beliefs(为捍卫信仰而战)
1.3defend A against/from B(保卫A免受B的伤害),比如,晚上单独出门,女孩要带好防狼喷雾来 defend themselves from sex attackers(保护自己免受性侵犯)
2.defend第二层意思=argue in support of(为…辩护)
2.1 defend sb from/against...(就...为sb辩护),比如,有钱人会不惜重金请律师defend him against the allegations(就指控为自己辩护),如果请不起律师,那只好在法庭上defend himself(自辨)
2.2奥巴马凭借他雄辩的口才来defend his point of views(为他自己的观点辩护)