defence against

defence 的音标是[dɪˈfens]，意思是防御、防卫。速记技巧是使用缩写形式来记忆单词，例如使用“deff”代替“defence”。

英文词源：

defence：源自拉丁语“defendere”，意为“保护，保卫”。

against：源自中古英语，表示“对着，与…相对”。

变化形式：

过去式：defended

过去分词：defended

现在分词：defending

相关单词：

1. defender：防守者，保卫者 - 词源同defence，表示保护、防卫的人或物。

2. defending：防守，防御 - 词源同defence，表示保护、防卫的行为。

3. defend：保卫，防御 - 词义扩大，表示保护、防卫的行动或状态。

4. defenceness：防御性 - 词义抽象化，表示防御的特质或状态。

5. offence：进攻 - 与defence相对，表示攻击、伤害的行为。

6. retaliation：报复，反击 - 与defence相对，表示对攻击行为的反击或报复。

7. resistance：抵抗，反抗 - 与defence相对，表示对攻击、压迫等的抵抗或反抗。

8. counter-attack：反攻，反击 - 与defence和retaliation相关联，表示对敌方攻击的反击。

9. attack：攻击 - 与defence相对，表示对敌方进行伤害或破坏的行为。

10. attack-and-defend strategy：攻防兼备战略 - 词义组合，表示一种同时进行攻击和防御的战略。

以上这些单词都与defence against这个短语有关联，通过词源和变化形式的分析，可以更好地理解这些单词的含义和用法。

常用短语：

1. defence against attack

2. defence against invasion

3. defence against theft

4. defence against fire

5. defence against disease

6. defence against crime

7. defence against weather

例句：

1. We must have a strong defence against attack to protect our country.

2. The army is on high alert to defend against any possible invasion.

3. The fire alarm went off, so we quickly had a defence against fire.

4. We must take measures to protect ourselves from diseases by washing our hands frequently and wearing masks.

5. Police are on the lookout to defend against crime in our city.

6. The weather is getting worse, so we must have a defence against the rain.

英文小作文：

Defence Against Threats

In today"s world, we are constantly facing various threats, whether it"s attacks, invasions, theft, fires, diseases, crime, or weather. To protect ourselves, we need to have a strong defence system in place. Whether it"s a security system at home or a military force defending our country, we must be ready to face any challenge head-on. With a well-prepared defence, we can feel safe and secure in any situation. It"s important to stay vigilant and take measures to protect ourselves from these threats, because they can have a negative impact on our lives and well-being.