1.book - n. a long written work for reading
2.border - n. a dividing line between nations
3.born - v. to come to life; to come into existence
4.borrow - v. to take as a loan
5.both - ad. not just one of two, but the two together
6.bottle - n. a container, usually made of glass, to hold liquid
7.bottom - ad. the lowest part of something
8.box - n. something to put things into; a container, usually made of paper or wood
9.boy - n. a young male person
10.boycott（地质、断交） - v. to refuse to take part in or deal with
11.brain - n. the control center of thought, emotions and body activity of all creatures
12.brave - ad. having no fear
13.bread - n. a food made from grain
14.break - v. to divide into parts by force; to destroy
15.breathe - v. to take air into the body and let it out again
16.bridge - n. a structure built over a waterway, valley or road so people and vehicles can cross from one side to the other
17.brief - ad. short; not long
18.bright - ad. giving much light; strong and clear in color
19.bring - v. to come with something
20.broadcast - v. to send information, stories or music by radio or television; n.a radio or television program

最后是快速版的语音材料，大家可以检验一下自己对今天单词的熟练程度哦
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