serve two purpose的意思|示意

Break the list into two lists, one which will serve the exterior purpose, and the other which you will keep short and work off of.

将这样的一个列表分解为两个列表，一个发挥外部的作用，另外一个尽量地保持简短。

In order to serve the design purpose, we can only use the following two means: One kind selects the variable motor, another means are use two quota motors parallel and the series connected cut method.

为了达到设计目的，我们只能采用以下两种办法：一种是选用变量马达，另一种办法是采用两个定量马达并联和串联切换的方法。

The first two mount options turn off atime updates, which are very rarely needed and serve little purpose other than to degrade filesystem performance.

前面的两个 mount 选项关闭 atime 更新，几乎不需要 atime 更新，并且它除了降低文件系统性能之外几乎不起任何作用。

However, keeping the two isolated does not serve any useful purpose. It also suggests adding a layer of indirection to join and mediate between presentation and business logic layers.

然而，只是简单的将二者分离开无法实现有效的功能，还需要加入一个间接层以连接并协调表现层与业务逻辑层。

Modularity allows one activity to be substituted for another one when the two activities serve the same purpose.

模块性允许两种目的相同的活动可以互相代替。

Every week or two, I run some strides on grass and can feel my forefoot padding the ground. They serve a purpose.

每一两个礼拜，我都会穿着它们在草地上跑一跑，并且能感到我是用前掌着地。