fence n．栅栏，围墙，剑术vt. 用篱笆围住，防护vi. 击剑，围以栅栏

例句：One end of the garden was fenced off for chickens.

花园的一端已用篱笆隔开来养鸡。

defense n. 国防部，防卫，防卫物vt. 谋划抵御

例句：The forest around the city will act as a defense against desertdust.

城市周围的森林能起防御沙漠灰沙的作用。

offence n. 犯罪，冒犯，违反，罪过，过错

例句：They were arrested for drug offences.

他们因吸毒罪而被逮捕。

offend v. 犯罪，冒犯，违反，得罪，使……不懈快

例句：David wishes ill to no one except those who intentionally offendhim.

大卫不盼任何人倒霉，除了那些有意冒犯他的人。

offensive adj. 讨厌的，无礼的，攻击性的 n．进攻，攻势

例句：You will find it difficult to explain your use of such offensivelanguage.

你使用这祥无礼的语言是很难解释的。