bachelor【 'bætʃələ】 
n.单身汉,文理学士,幼雄兽
Do you have a Bachelor of Arts degree?
你是否有文学学士学位?
He lived and died a bachelor.
他终生未娶。
back【 bæk】 
adj.后面的,在后面,早过去的;adv.向后地;n.背部,后面;v.后退,支持
Please give me your phone number and I will have a specialist call you back.
请给我你的电话号码,稍后我打给你。
Will you scratch my back?
你可以抓我的后背吗?
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?
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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。
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。
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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。
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?
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