英语听力每日五分钟（高级）34

If these tendencies continue, those aged 65 or more will account for a quarter of the population within 30 years.
如果这些趋势继续下去，65岁或以上的人将在30年内占人口的四分之-。
There is no more dangerous experiment than that of undertaking to be one thing before a man's face and another behind his back.
没有比在一个人面前做一套背后做一 套更危险的行为了。
The major result from recent investigations of Emmet's theory has been that it can be applied to biochemistry as well.
埃米特理论最近的研究成果已经开始应用于生物化学领域。
The basis of this system is that the students must take turns in teaching,they have to help each other.
这个制度的基础是学生必须轮流教学，他们必须互相帮助。
Career opportunities, flex-time, satellite offices, and more childcare facilities are required to make women at home join the work force.
职业机会、弹性工作时间、远程办公和更多的托儿设施是使在家的妇女加入工作队伍所必需的。
When bears sleep or lie down, their postures depend on whether they want to get rid of heat or conserve it.
当熊睡觉或躺下时,它们的姿势取决于它们是想散热还是取暖。
A boy and a girl came in. Ispoke to the boy, who seemed to be older than the girl.
-个男孩和一个女孩进来了。我和那个似乎比女孩年纪大的男孩交谈过。
A buyers' market is a market in which goods are plentiful, buyers have a wide range of choices, and prices are low.
买方市场是指一个商品丰富、买方有广泛选择、价格低廉的市场。