21. back
He slipped and fell on his back. 他仰天滑到。

22. balance
Don’t get excited; keep your balance. 不要冲动，保持冷静。

23. base
A naval¹ base is located at Wei Hai. 威海有个海军基地。

24. behavior
Tom won a prize for good behavior at school. 汤姆在学校里得到品行优良奖。

25. belief
He has lost his belief in God. 他已不相信上帝。

26. birth
That baby weighed seven pounds at birth. 那婴儿生下来七磅重。

27. bit
He ate every bit of his dinner. 他把他的晚餐吃得光光。
She’s feeling a bit tired. 她觉得有点疲倦。
He doesn’t care a bit. 他一点也不在乎。

28. bite
His face was covered with insect bites. 他满脸都是蚊虫咬伤。
I haven’t had a bite since morning. 我从早晨到现在一口东西都未吃过。
There’s a bite in the air this morning. 今天早晨有点寒风刺骨。

29. blood
He gave his blood to help his sister. 他输血给他的妹妹以救她。
His blood is up. 他发脾气了。
His blood ran cold. 他吓得魂不附体。

30. blow
Let’s go for a blow. 让我们到户外吹吹风。

31. body
His body was brought back to England for burial. 他的遗体被运回英国埋葬。
She’s a nice old body. 她是一个很好的老人。

32. brass²
get down to brass tacks³ 开门见山

33. bread
I’m only dong it for the bread. 我纯粹是为了钱才做那件事。

34. breath
They are not be mentioned in the same breath. 他们不可同日而语。
There wasn’t a breath of air/wind. 一丝微风都没有。

35. brother
He is my brother. 他是我的兄弟。

36. building
buidling materials 建筑材料
building site 建筑工地

37. burn
He died of the burns he received in the fire. 他死于火灾时所受到的灼伤。

38. burst
a burst of applause⁴ 一阵喝彩

39. business
He is in business of himself. 他自行经商。
That’s no business of yours. 那事与你无关。
I’m sick of the whole business. 我对这事情实在感到厌烦。

40. butter
butter will not melt in sb’s mouth 一本正经的样子
peanut buttter 花生酱