人及动物身体由于某些因素的作用，细胞恶性增生而形成的恶性肿瘤

phr. 非常喜爱,舍不得放下 love something so much that one cannot bear to put it down

“获得性免疫缺陷综合征”的简称，由人类免疫缺陷病毒（HIV）引起的一种传染病

每家每户，户户不漏

to look cold and indifferent, standoffish

to save face, to worry about losing face, proud of one's reputation, sensitive about losing prestige, sense of propriety