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1·The town walls were built as a defence against enemy attacks.

城墙是为防御敌人袭击而修建的。《牛津词典》

2·Residents have the responsibility of being the first line of defence against wildfires.

居民有责任成为野火的首要防卫人员。《柯林斯英汉双解大词典》

3·Despite anything the science of medicine may have achieved, the immune system is our main defence against disease.

不管医疗科学已取得了什么样的进步，免疫系统仍是我们抵抗疾病的主要防御手段。《柯林斯英汉双解大词典》

4·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》

5·There can be no real defence against attacks from the air.

对来自空中的攻击是无法设防的。《新英汉大辞典》

6·Defence against these threats enhances our collective security.

防范这些威胁将加强我们的集体安全。

7·Bundling provides incumbent operators with another defence against VoIP.

捆绑销售是主体运营商对付网络语音技术的另一防御手段。

8·Healthy eating and lifestyle habits are a strong defence against the disease.

健康的饮食和生活习惯是防御该疾病的利器。

9·The posterior hypothalamus performs the function of defence against cold.

下丘脑后部执行着抵御寒冷的功能。

10·In particular, they hope to break down the collective defence against antibiotics.

换而言之，化学家们希望打破病原体针对抗生素的联合防御。

防御

1·The town walls were built as a defence against enemy attacks.

城墙是为防御敌人袭击而修建的。《牛津词典》

2·Disease is also a risk, as members of tribal groups that have been contacted in the past have died of illnesses that they have no defence against, ranging from chicken pox to the common cold.

疾病也是一个危机，正如过去曾经接触过的，都已经死于疾病的其他部落的成员一样，他们没有任何的疾病防御，从水痘到普通的感冒都一样。

3·Strangely, she felt this awful feeling each time Ron spoke about the Defence Against the Dark Arts teacher.

可奇怪的是，每次罗恩提起这位黑魔法防御术老师，她就会感到这种恶劣的情绪。

4·Well, not until a certain git by the name of Lockhart took over as Defence Against the Dark Arts teacher, at any rate.

呵呵，直到有天有个叫洛哈特的饭桶当了黑魔法防御术老师，情况就不同啦。

5·You know, we'd really like to read the job adverts that Hogwarts publishes for the Defence Against The Dark Arts teaching post.

如你所知，大家都很乐意去拜读下霍格沃茨黑魔法防御术教授的招聘广告。