1.behavioral a.行为的( of or relating to behavior)

来自behavior(n．行为举止)

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

派生词：behaviourism(n.行为主义)

2.bellows n．风箱(apparatus for driving air into or through sth.)

词根记忆：和bellow(v.吼叫)一起记

3.benchmark n.基准(something that serves as a standard by which others may be measured or judged)；v.标准测试(to study, as a competitors product or business practices, in order to improve the performance of ones own company)

联想记忆：bench（法官席，引申为法律）+mark(记号)一将法律作为我们的基准

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)

词根记忆：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.

同根词：benevolent(a．慈善的)

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

词根记忆：来自benefit(n.利益)

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

同根词：beneficial(a．受益的，有利的)

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