The secondary outcome measure was FFD (Finger-floor distance).
次要测量指标FFD（指地距）。
Try it. Measure the distance from the tip of your head to the floor.
测量一下你们的身高，再用身高除以你们肚脐到地面的距离。
His rucksack lay on the floor a short distance away, wet and muddy.
他的包裹就在不远处的地板上，拖泥带水。
His rucksack lay on the floor a short distance away, wet and muddy.
他的包裹就在不远处的地板上，拖泥带水。
应用推荐