big【 big】 
adj.大的，重要的，量大的，重要的；adv.夸大地，顺利
 These shoes are too big.这鞋子太大了。
 They both agree that he made a big mistake.他们一致认为他犯了个大错。
bike【 baik】 
n.脚踏车，自行车
My bike is perfect for riding through mountain terrain.
我的自行车是很适合山地骑行的。
 Do you own a dirt bike or a mountain bike?你拥有一辆泥地摩托车还是一辆山地车?
bilateral【 bai'lætərəl】 
adj.有两面的，双边的
The two countries reached a bilateral agreement.
两个国家达成了一个协定。
 Do you own a dirt bike or a mountain bike?你拥有一辆泥地摩托车还是一辆山地车?
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bill【 bil】 
n.帐单，钞票，票据，清单，议案，法案，广告；vt.用海报宣传，把……列成表，给……开帐单
Do you have anything smaller than a one hundred dollar bill?
你有没有比一百美元面值更小的钞票？
 The duck's bill almost appears too large for its head.对它的头来说，这个鸭嘴似乎太大。
billiard【 'biljəd】 
adj.台球的，弹子戏的
He received a brand new set of billiard balls for Christmas.
他收到了一套崭新的撞球作为圣诞礼物。
 Would you like to join me in a game of billiards?你想和我打一场桌球比赛吗?
billion【 'biljən】 
n.adj.十亿（的）
There are over one billion people in China.
中国的人口超过十亿。
 Stars are balls of gas burning billions of miles away.恒星是在数十亿英里之外气体燃烧着的火球。
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billow【 'biləu】 
n.巨浪，波浪般滚滚向前的东西；v.翻腾
The sheet billowed in the wind.
被单在风中吹起。
 Smoke billowed from the burning building.浓烟一直从那个着了火的建筑物中冒出来。
bin【 bin】 
n.箱柜
Just throw your trash into a waste bin.
把垃圾扔进废物箱。
 We keep the children's toys in a bin in the nursery.我们把小孩的玩具放在托儿所的玩具箱里。
bind【 baind】 
v.绑，镶边，装订，凝固，约束
When I ran out of money, I was in a bit of a bind.
当我钱花完的时候，我就处于比较困难的境地了。
 They bind the boxes together.他们将箱子捆扎在一起。
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