disappear  vi. 消失，不見(jiàn)
[特征]
- the boy disappeared in the dark.
這個(gè)男孩在黑暗中消失了。
[備考必背]
disappear是非延續(xù)性動(dòng)詞，不能和表示一段時(shí)間的狀語(yǔ)連用。
（誤）the beast has disappeared for a long time.
（正）the beast disappeared a long time ago.
這只野獸消失很久了。

disappoint  vt. 使失望
[特征]
- what you did disappointed me.
你的所作所為令我失望。
[備考必背]
①disappoint的過(guò)去分詞disappointed可以當(dāng)作形容詞用，意思是“失望的”。disappointed, disappointing的用法和interested, interesting一樣。disappointed是“失望的，失意的”；disappointing是“令人失望的，掃興的”。
- i was disappointed that he had left.
我很失望他已經(jīng)離開(kāi)了。
- the weather was disappointing.
天氣叫人不痛快。
②派生詞：disappointmen  n. 失望
- to their disappointment, the result was contrary to their expectation.
結(jié)果與預(yù)料恰好相反，這使他們感到失望。

discrimination  n. 歧視
[特征]
race discrimination 種族歧視
sex discrimination 性別歧視
- discrimination against women is not allowed.
不允許歧視婦女。
[貼心叮嚀]
discrimination特別指種族歧視或性別歧視等。

disease  n. 疾病
[特征]
- it is a terrible disease.
這是一種可怕的疾病。
- these are the diseases of society.
這些是社會(huì)弊端。
[貼心叮嚀]
disease原指所患的“疾病”，也引申為社會(huì)“弊端”。
[備考必背] 辨析disease和illness
disease指具體某種疾病，是一個(gè)專業(yè)性詞匯；illness指生病的狀態(tài)，是由disease引起的。
an occupational disease職業(yè)病  a disease of the eyes 眼病
- he can't go to school because of his illness.
他因?yàn)橛胁〔荒苌蠈W(xué)。