一阵大风吹得他失去了平衡，脸朝下摔在了泥里。
A gust of wind knocked him off balance and he fell face down in the mud.
一个男人从街上走进来，脸朝下摔倒在地上，昏了过去。
A man walked in off the street and fell flat on his face, unconscious.
躲猫猫（锻炼后腰）：脸朝下，用你伸展的胳膊支撑住你前面的婴儿。
Peek-a-boo (lower back): Lie face down on the floor using your outstretched arms to support baby in front of you.
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