| 1. | The reproductive success of secondary cavity - nesting birds influenced by nest - site characteristics
次级洞巢鸟的繁殖成功受巢位特征的影响。 |
| 2. | Because parrots have low reproductive success , a pair will typically produce only one clutch of two or three eggs a year
由于鹦鹉的繁殖力低，一对交配成功的鸟儿通常每年只产下一窝，一到三个鸟蛋。 |
| 3. | These insect visitors are important for reproductive success of the two species because their seed - set is not high without pollinators " visiting
主要传粉昆虫为缨翅目蓟马及少量膜翅目昆虫，自交结实率不高。 |
| 4. | Such a discrepancy would have a dramatic impact on the reproductive success of certain fish , and could mean population decline and possible extinction
这个失衡会直接影响某些鱼种的成功繁殖，引起数量的减少，并可能消失。 |
| 5. | Salmon are a crucial resource for the bears because the survival and reproductive success of these large mammals depend on the amount of fat they can deposit in the late summer and fall
对熊来说，鲑鱼是很重要的营养来源，因为这些大型哺乳动物是否能生存并繁殖成功，取决于?们在夏末和秋季储存了多少脂质。 |
| 6. | They discovered body size was linked to animal numbers ： when lots of large sheep came into the population , the numbers tended to fluctuate quite widely , possibly because body size is linked to reproductive success
他们发现，体型大小与动物数量有关：当许多大型羊只进入羊群，羊群数目就倾向有相当大幅的波动，可能是因为体型大小与繁殖成功有关。 |
| 7. | As a result , powerful men of high status throughout human history attained very high reproductive success , leaving a large number of offspring ( legitimate and otherwise ) , while countless poor men died mateless and childless
结果，贯穿人类历史，那些有权、高社会地位的男性的繁殖成功率是非常的高，留下了一大批数目的（合法的和非法的）后代，有数不清的贫穷男性却没有过交配、没有儿女。 |
| 8. | Recent epidemiological and physiological evidence suggests to us that the worldwide pattern of human skin color is the product of natural selection acting to regulate the effects of the sun ' s ultraviolet ( uv ) radiation on key nutrients crucial to reproductive success
最新的流行病学与生理学证据，令我们想到：人类肤色的全球分布模式是天择的产物，因为阳光中的紫外线辐射会影响某些营养素，而那些营养素是生殖成就的关键。 |
