She ate two hot dogs, and he ate three hot dogs, so between them they ate five hot dogs.她吃了两根热狗，他吃了三根，所以他们一共吃了五根。He has three fingers on each hand and deformed feet.他双手均为三根手指，且脚部畸形。The pictures are held in place by three slender brass rods.这些画用三根细长的铜棒固定住。