There has been a close bond between them ever since she saved him from
drowning.她在他快要溺水时救过他一命，从那之后，他们便一直保持着密切的联系。

The company is now selling bonds in an effort to borrow money. 为了资金，这家公司正在发行债券。

boom n.繁荣

This year has seen a in book sales.今年是图书销售繁荣的一年。

The industry was booming at one time and then it suddenly crashed.该行业曾兴盛一时，后f突然开始衰退。

boost vt.增加，提高

Share prices were boosted by reports of the president's recovery. 总裁康复的消息推动了股价上涨。

border n.边缘；边界；v.接壤

The wallpaper had a dark border at the top.壁纸顶部有一条深色的装饰边。

The shrubs border our yard on the east side.我们院子的东边紧挨着灌木丛。

bore v. 钻孔vt.令人厌烦

The carpenter bored a hole in the tabletop.木匠在桌面上钻了一个洞。

That girl’s voice would Mre anyone.那个女孩的声音让所有人厌烦。

bother vt.烦扰，打扰

Don’t bother your dad. He’s sleeping•别打扰你爸爸。他在睡觉呢。

bounce vi.跳起，弹回

The basketball bounced off the backboard and into the net.篮球弹在篮板上，然后落人篮筐中。

bound adj.被束缚的；有义务的

I feel bound by my promise.我感觉被自己的承诺所束缚。

boundary n.分界线，边界

The Ural mountains marked the boundary between Europe and Asia.乌拉尔山脉成为欧洲与亚洲的分界线。

breed vt.养育，繁殖n.品种

His main income comes from breeding cattle.他的主要收入来源于养牛。

This is a particular breed of sheep•这种羊是非常特别的品种。