它不停地上上下下，旋转着的像叶片一样的是它的足。
It spends its time hovering about upside down. The rotating blade is its foot.
好在每过一短土路就有一段刚修好的柏油路，我们骑着车可以比较容易地上上下下轮着走。
Still, parts of the new highways are good enough to ride on, so we alternate between the finished roads and the bump sections.
边境警察会一丝不苟地上上下下检查，很多人会感到极其恐慌，而且由于害怕，他们的裤子通常都尿湿了。
Many went into panic during the meticulous searches by the border police and wet their pants with fear.
边境警察会一丝不苟地上上下下检查，很多人会感到极其恐慌，而且由于害怕，他们的裤子通常都尿湿了。
Many went into panic during the meticulous searches by the border police and wet their pants with fear.
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