infectious，contagious相似詞語辨析
infectious，contagious
這一對(duì)詞都是形容詞，又都具有傳染性的、傳染病的意義，但內(nèi)涵和使用場(chǎng)合有所不同。
Infectious disease 是間接傳染的病，指病菌通過空氣、食物、水、衣服、容器等物的傳染。例：
Tuberculosis is an infectious disease.
肺結(jié)核是一種傳染病。
Its said that cancer is not infectious.
據(jù)說癌癥是不會(huì)傳染的。
Contagious disease 是直接傳染的病，一般指跟病人直接接觸而感染的病。例：
Scarlet fever is a contagious disease.
猩紅熱是一種傳染病。
Measles and aids are highly contagious.
麻疹和艾滋病是很易傳染的。
這兩個(gè)詞用作轉(zhuǎn)義時(shí)，可以互換使用，它們都表示感化、感染之意。例如：
The enthusiasm for the pop-singer is contagious.
He stood there like a fool amid the infectious laughter of his friends.
Infectious 的名詞是 infection；contagious的名詞是contagion.