| 1. | The graph shows a bulge in the birth rate .
图表显示出生率的暴增。 |
| 2. | The birth rate in our country has been declining for several years .
我国人口的出生率几年来一直在下降。 |
| 3. | The proportion of the population was going down in the past few years .
在过去的几年里人口出生率在下降。 |
| 4. | First, high birthrates cannot be altered substantially overnight .
第一，高出生率不可能在一夜之内就被改变。 |
| 5. | Reduction of competition for food stimulates both natality and survival .
食物竞争的减少，刺激了出生率和存活力。 |
| 6. | They are the only possible means of dealing with excessive fertility .
它们是解决人口出生率过高这一问题的唯一手段。 |
| 7. | The rates of growth of births and deaths will depend a number of factors .
增长率、出生率和死亡率都决定于若干因素。 |
| 8. | Both birth and death rates are strikingly different between the two groups of countries .
两类国家的出生率和死亡率显著不同。 |
| 9. | In the case of population growth this momentum can persist for decades after birthrates drop .
人口增长的这种势头在出生率下降后还可以持续四年。 |
| 10. | The census bureau says birthrates have dropped in every area of the world except africa .
人口普查局说，除了非洲之外，世界各地的出生率近来已有所下降。 |
