友情提示：看不懂音变的同学请听203-206期

cancer can,sir
Any of various malignant neoplasms characterized by the proliferation of anaplastic cells that tend to invade surrounding tissue and metastasize to new body sites. The pathological condition characterized by such growths.
A pernicious, spreading evil:
n. 癌症；恶性肿瘤

Cancer
In all senses also called Crab.
A constellation in the Northern Hemisphere near Leo and Gemini.
The fourth sign of the zodiac in astrology. One who is born under this sign.
n.【天文学】巨蟹(星)座 【占星术】巨蟹宫

词源小故事 （我录音的时候是倒数第二行，排版时变成倒数第一行了）

[14] Cancer comes from Latin cancer, which meant literally ‘crab’. It was a translation of Greek karkínos ‘crab’, which, together with its derivative karkínōma (source of English carcinoma [18]) was, according to the ancient Greek physician Galen, applied to tumours on account of the crablike pattern formed by the distended blood vessels around the affected part。

古希腊医生希波克拉底和盖伦都已经注意过，某些肿瘤因为形状较大并且主要是因为肿瘤中的肉和血管等的膨胀和扭曲很像“横行”的螃蟹，所以把肿瘤叫做cancer，意思就是“像螃蟹一样”。

canker
ulceration of the mouth and lips.
An inflammation or infection of the ear and auditory canal, especially in dogs and cats.
A condition in horses similar to but more advanced than thrush.
A localized diseased or necrotic area on a plant part, especially on a trunk, branch, or twig of a woody plant, usually caused by fungi or bacteria. Any of several diseases of plants characterized by the presence of such lesions.
A source of spreading corruption or decay.
To attack or infect with canker.
To infect with corruption or decay.
To become infected with or as if with canker.
n. [植保] 溃疡病；口疮；腐败的原由，弊害
vi. 产生溃疡；腐败起来
vt. 使患溃疡；使腐败

例句：
Is hypocrisy the canker of our society?
虚伪是我们社会的弊端吗?

chancre
A dull red, hard, insensitive lesion that is the first manifestation of syphilis.
n.（硬性）[性病] 下疳：一种暗红色坚硬不敏感的引起机能障碍的一种病，为梅毒的初期症状

carcinoma oma后缀表示“异常生长物”的“瘤”了，这样加起来就是“肿瘤”！
An invasive malignant tumor derived from epithelial tissue that tends to metastasize to other areas of the body.
n. [肿瘤] 癌

fiend friend foe field领域
An evil spirit; a demon. The Devil; Satan. A diabolically evil or wicked person.
Informal. One who is addicted to something: a dope fiend.
Informal. One who is completely absorbed in or obsessed with a given job or pastime: a crossword-puzzle fiend.
Informal. One who is particularly adept at something
n. 魔鬼；能手；成癖者；[the Fiend]撒旦，魔王，恶魔

背景知识:

撒旦(Satan)，圣经中的恶魔（或称魔鬼撒旦），反叛耶和华的堕落天使（Fallen Angels）。他曾经是上帝座前的六翼天使,负责在人间放置诱惑,后来他堕落成为魔鬼,被看作与光明力量相对的邪恶、黑暗之源。

希伯来文的本意为“敌对者”(Adversary)，在某些宗教信仰的经典里都曾被提及。另一说法认为撒旦就是堕天使路西法。

foe
A personal enemy.
An enemy in war.
An adversary; an opponent: a foe of tax reform. See Synonyms at enemy.
Something that opposes, injures, or impedes
n. 敌人；反对者；危害物

短语:
foe worthy of someone's steel 劲敌，值得某人与之一斗的强敌
our (或 arch) foe 【宗教】恶魔
sworn foe 死敌，不共戴天的敌人