1.behavioral a.行為的( of or relating to behavior)

來自behavior(n．行為舉止)

例:Geneticists consider the gene to be a behavioral gene.

派生詞：behaviourism(n.行為主義)

2.bellows n．風(fēng)箱(apparatus for driving air into or through sth.)

詞根記憶：和bellow(v.吼叫)一起記

3.benchmark n.基準(zhǔn)(something that serves as a standard by which others may be measured or judged)；v.標(biāo)準(zhǔn)測試(to study, as a competitor's product or business practices, in order to improve the performance of one's own company)

聯(lián)想記憶：bench（法官席，引申為法律）+mark(記號)一將法律作為我們的基準(zhǔn)

例:The technique to judge the performance of a company by comparing it with other companies is called“benchmarking".

4.benefactor n.行善者，捐助者(one that confers a benefit)

詞根記憶：bene(好)+fact(做)+or--做好事的人--行善者

例:Since private institutions had also lost benefactors, they began to charge patients.

同根詞：benevolent(a．慈善的)

5.beneficiary n．受益人，受惠者(one that benefits from sth.)

詞根記憶：來自benefit(n.利益)

例:Moreover, part of this remaining third is received by workers who are shareholders, pension beneficiaries, and the like.

同根詞：beneficial(a．受益的，有利的)

6.benefit n.利益，好處(sth. that promotes well-being)；救濟金(financial help in time of sickness, old age, or unemployment);v.有益于，對…有益(to be useful or profitable to)

詞根記憶：bene(好)+fit--利益；有助于

例:There are no types of vegetation on Tufe lsland that are known to benefit from dry conditions.

同根詞：beneficial(a．有益的；有利的)

7.benevolence n.仁慈：善行(an act of kindness)

詞根記憶：bene(好)+vol（意志）+ ence--好的意志--仁慈

例:The cult of female domesticity developed independently of the concept of female benevolence.

同根詞：benevolent(a.善心的)

8.bestow v.放置(to put in a particular place)；授予(to give)

詞根記憶：be+stow(裝載；收藏)一收藏起來一放置

例:The committee bestowed an engraved plaque on the contest winner.

9.betrayal n.背叛( defection )

詞根記憶：來自betray( v.背叛 )

例:In broadcast debates, critics dismissed the program as a betrayal of national identity.

10.better off a．境況較好或較富裕(be happier or richer)

例:Many of them are no better-off financially than they were before the increase in production.