The table was a small, flat kidney of green baize.

桌子是一个小而扁平的绿色粗呢腰子。

Because according to a new study published in The Journal of the American Osteopathic Association this week, riding a moderately intense roller coaster might help you pass small kidney stones.

因为根据本周发表在美国整骨疗法协会杂志上的一项新研究，乘坐中等强度的过山车可能有助于排出小肾结石。