如果您必须使用后代选择器，尽量使用子代选择器，这最少只需评估一个额外的节点，而非中间直至祖先的所有节点。
If you must use descendant selectors, prefer child selectors, which at least only require evaluation of one additional node, not all the intermediate nodes up to an ancestor.
如果使用端点的上下文菜单导航到这里，现在必须选择要安装的子代理(第2步和第3步)。
If you used the context menu of an endpoint to navigate here, you have to select the sub-agent to install now (Steps 2 and 3).
在许多拥有较长幼年期的物种中，雌性选择让雄性孵化后代来增加雄性对子代的感情投入。
In many species with long childhoods, female choice bred males to evolve increasing emotional investment in their offspring.
换句话说，它没有选择深度优先(到达子代)，而是遍历相邻元素。
In other words, instead of going depth-first (to the children), it goes through the adjacent elements.
第二我们可以选择饮料瓶子代替纸的包。
Second we can choose drinks in bottles instead of those in paper packets.
今天的大同小异-每个人在生存机会和子代数量都是相同的-意味着同部落人们相比，自然选择在印度的上层阶级中已失去了80%的力量。
The grand mediocrity of today-everyone being the same in survival and the number of offspring-means that natural selection has lost 80% of its power in upper-middle-class Inida compared to the tribes.
并以算术杂交算子选择两个父代配对，均匀变异产生子代。
And then, mate of two father generation chromosomes were selected by arithmetical crossover to generate sub-generation.
选择1：对于2009年4月13日（星期一）到4月19日（星期日）的航班，如果旅客在有效期内取消飞往曼谷或由曼谷出发的航班，我们将提供电子代金券，有限期为三个月。
Option 1: For flights from April 13 (Monday) to April 19 (Sunday), 2009, we offer a credit shell, valid for 3 months - if guests cancel their flights to and from Bangkok during the valid dates.
选择1：对于2009年4月13日（星期一）到4月19日（星期日）的航班，如果旅客在有效期内取消飞往曼谷或由曼谷出发的航班，我们将提供电子代金券，有限期为三个月。
Option 1: For flights from April 13 (Monday) to April 19 (Sunday), 2009, we offer a credit shell, valid for 3 months - if guests cancel their flights to and from Bangkok during the valid dates.
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