Baseball fans have a choice: the Cubs or the White Sox.

VOA: special.2009.01.12

When a new male lion takes over a pride what he does is kill all the remaining cubs and any lionesses undergo spontaneous abortions.

当一个新雄狮接管领地,它将杀死留下的幼仔,和任何经历过自然流产的雌狮。

耶鲁公开课 - 心理学导论课程节选

These cubs are not going to survive once they are born so the female's best strategy is to get rid of them and start anew.

一旦幼仔出生后不能生存,雌狮的最好方式,是摆脱掉它们，开始新生活。

耶鲁公开课 - 心理学导论课程节选

The other cubs are genetic competition for him.

其他幼仔是他的竞争基因。

耶鲁公开课 - 心理学导论课程节选