今天我们要学的词是immune。Immune, 的意思是免疫的，比如，immune system就是指免疫系统， immune disease则是免疫系统疾病。Immune还可以指"免除的","不受影响的". "Apple's OS X, which has long been considered immune to viruses, was recently hit by a malicious software called Flashback," 苹果电脑的OS X操作系统一向被认为百毒不侵，可是最近，该系统遭到一种名叫Flashback的恶意软件的袭击。 "The IMF says Africa's economy is expanding, but it is not immune to global slowdown," 国际货币基金组织说，非洲经济整体有所发展，但并不能完全不受全球经济放缓的影响。好的，今天我们学习的词是immune...