The test consists of placing the bottom of a foot in water, then stepping on a paper bag or some other object that will show how high or flat a person's arch is.
测试要先把脚底浸湿，然后踩在纸袋或其它可以显示你足弓高度的物体上。
Its door was open, and stepping into black darkness he fell headlong over some heavy object on the floor.
房门开着，因为太黑，他进去的时候绊到了重物头向下摔倒。
Its door was open, and stepping into black darkness he fell headlong over some heavy object on the floor.
房门开着，因为太黑，他进去的时候绊到了重物头向下摔倒。
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