background【 'bækgraund】 
n.背景,后台,不重要或不引人注目的地方或位置
The background colors were bright and lively.
背景颜色是明朗而活泼的。
What is your educational background?
你的教育背景是什么?
backward【 'bækwəd】 
adv.adj.向后地(的),相反地(的),追溯,退步,由好变坏
Can you spell your name backward?
你可以反拼你的名字吗?
It's dangerous to walk backward.
向后走是危险的。
bacon【 'beikən】 
n.咸肉,熏肉
Bacon is not good for you in large amounts.
吃多了熏肉对你的身体不好。
I would like a bacon cheeseburger, please.
我想要一份熏肉三明治。
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bacteria【 bæk'tiəriə】 
n.细菌
Bacteria collect in warm, moist places.
细菌在温暖、潮湿的地方滋生。
Bacteria can decompose organic matter.
细菌能使有机物腐烂。
bad【 bæd】 
adj.劣质的,有害的,坏的,不利的,不健康的,严重的
I have some bad news.
我有些坏消息(要宣布)。
It doesn't look that bad.
它看起来没那么糟。
badge【 bædʒ】 
n.徽章,证章
The police officer showed me his badge.
警察给我出示了他的徽章。
Wisdom is a badge of maturity.
智慧是成熟的象征。
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badly【 'bædli】 
adv.严重地,恶劣地
My ankle was badly injured.
我的脚踝伤得很严重。
Why is my child behaving so badly?
为什么我的孩子表现得如此差劲呢?
badminton【 'bædmintən】 
n.羽毛球
They challenged us to a game of badminton.
他们向我们挑战羽毛球。
I am an excellent badminton player.
我是个优秀的羽毛球运动员。
baffle【 'bæfl】 
vt.困惑,阻碍,为难
One of the exam questions baffled me completely.
有道考题完全把我难倒了。
The scientists were baffled at the results of the test.
科学家对测试的结果大惑不解。
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