For example, some individuals from rural communities may be experts at digging and maintaining Wells. Others may be familiar with simple pumps or common pump motors.
比如，一些从农村来的人可能擅长挖井、修井，还有一些人可能会使用简易水泵或普通的水泵发电机。
Some of the most common factors are non-medical and simple, and they can be treated by making small changes in your routine.
一些常见的因素是简单的非医学的，它们可以通过日常中一些小的改变来改善。
Some of the most common factors are non-medical and simple, and they can be treated by making small changes in your routine.
一些常见的因素是简单的非医学的，它们可以通过日常中一些小的改变来改善。
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