第一册
Lesson 1-4
Lesson 5-8
Lesson 9-12
Lesson 13-16
Lesson 17-20
Lesson 21-24
Lesson 25-28
Lesson 29-32
Lesson 33-36
Lesson 37-40
Lesson 41-44
Lesson 45-48
Lesson 49-52
Lesson 53-56
Lesson 57-60
Lesson 61-64
Lesson 65-68
Lesson 69-72
Lesson 73-76
Lesson 77-80
Lesson 81-84
Lesson 85-88
Lesson 89-92
Lesson 93-96
Lesson 97-100
Lesson 101-104
Lesson 105-108
Lesson 109-112
Lesson 113-116
Lesson 117-120
Lesson 121-124
Lesson 125-128
Lesson 129-132
Lesson 133-136
Lesson 137-140
Lesson 141-143
pool
n.赌注
win
v.赢
world
n.世界
poor
a.贫穷的
depend
v.依靠（on）
extra
a.额外的
engineer
n.工程师
overseas
a.海外的；国外的
engineering
n.工程
company
n.公司