我们必须种树的原因是它们能供应我们新鲜的空气。
144. So precious is time that we can't afford to waste it.
时间是如此珍贵，我们不能浪费它。
145. Rich as our country is, the qualities of our living are by no means satisfactory.
虽然我们的国家很富有，但是我们的生活质量却令人很不满意。
146. The harder you work, the more progress you make.
你越努力，你越进步。
147. The more books we read, the more learned we become.
我们书读得越多，我们越有学问。
148. To average people, they often tend to live under the illusion that English often means a good opportunity for one's career, is this really the case?
对于一般人来说，他们常常以为掌握英语就意味着一份好的工作，然而这是真的吗？
149. By taking exercise, we can always stay healthy.
通过体育锻炼，我们能够始终保持健康。
150. Listening to music enables us to feel relaxed.
听音乐能使我们放松。
151. On no account can we ignore the value of knowledge.
我们绝对不能忽视知识的价值。
152. It is time the authorities concerned took proper steps to solve the traffic problems.
该是有关当局采取适当的措施来解决交通问题的时候了。
153. Those who violate traffic regulations should be punished.
违反交通规则的人应该受到处罚。
154. There is no one but longs to go to college.
人们都希望上大学。
155. Since the examination is around the corner, I am compelled to give up doing sports.
既然考试迫在眉睫，我不得不放弃作运动。
156. It is conceivable that knowledge plays an important role in our life.
可想而知，知识在我们的一生中扮演一个重要的角色。
157. Summer is sultry. That's the reason why I don't like it.
夏天很闷热，这就是我不喜欢它的原因。
158. The progress of the society is based on harmony.
社会的进步是以和谐为基础的。
159. We should bring home to people the value of working hard.
我们应该让人们知道努力的价值。
160. Taking exercise is closely related to health.
作运动与健康息息相关。
161. We should get into the habit of keeping good hours.
我们应该养成早睡早起的习惯。
162. The condition of our traffic leaves much to be desired.
我们的交通状况令人不满意。
163. Smoking has a great influence on our health.
抽烟对我们的健康有很大的影响。
164. Reading does good to our mind.
读书对心灵有益。
165. Overwork does harm to health.
工作过度对健康有害。
166. Pollution poses a great threat to our existence.
污染对我们的生存造成巨大威胁。
167. We should do our best to achieve our goal in life.
我们应尽全力去达成我们的人生目标。
168. Weather a large family is a good thing or not is a very popular topic, which is often talked about not only by city residents but by farmers as well.
家庭人口多好还是家庭人口少好是一个非常通俗的主题，不仅是城里人，而且农民都经常讨论这个问题。
169. As is known to all, fake and inferior commodities harm the interests of consumers.
()