accidental, incidental, adventitious? They all mean not being part of the real or essential nature of something.

它們都指不是事物真正的或基本的實質內容。

accidental? 英 [??ks??dentl]? 美 [??ks??d?ntl]??retains its basic notion of chance occurrence but may also imply nonessential?character.

它保留了偶然性的基本含義，但也指非本質的特性。(反)essential

例子：It could plausibly be argued that this diversity is accidental. ?人們可以貌似有理地爭辯說，這一差異是屬于偶然性的。

cad, cas, cid=fall,表示”落下,降臨”

1 ：accidental偶然的 ?2：decaent ?頹廢的 3：coincide 巧合,同時發生 4：incidentaladj. 附帶的；偶然的；容易發生的

incidental? 英[?ns?'dent(?)l]美['?ns?'d?ntl]suggests a real, sometimes a designed, relationship but one which is secondary andnonessential.

它表示真正的(有時是計劃好的)、但又是次要的、非本質的關系。(反)essential

At the bottom of the bill, you will notice variousincidentalexpenses such as faxes.

例子：在賬單底部,你會發現有傳真等各項雜費。

adventitious?英 [??dven?t???s]? 美 [??dv?n?t???s, -v?n-] implies a lack of essential relationships and may suggest casual addition orirrelevance.

它指缺少內在的聯系，也可表示偶然的增加或表示無關。(反)inherent

例子：The court tries to understand whether the young man's misconduct was adventitious or the result of some serious flaw in his character.

法庭想弄明白這個年輕人的錯誤行為是偶然犯下的還是他性格中固有的缺陷造成的

ven,vent=come,表示”來”

1：adventitious a 偶然的,不定的 ?2:prevent v 防止,阻止 ?3 :contravene v 違反