ninepin
/ˈnaɪnpɪn; `naɪnˌpɪn/ n
1 ninepins [sing v]
game in which a ball is rolled along the floor at nine bottle-shaped blocks of wood in order to knock them down 九柱地滚球（沿地面滚球撞击九根瓶状木柱的游戏）. Cf 参看 skittle, tenpin bowling.
2 [C] any of these blocks of wood （九柱地滚球的）瓶状木柱.
3 (idm习语) ,go down like `ninepins fall or be knocked over, etc in great numbers （大量地）倒下, 打翻
There's a lot of flu about people are going down (ie catching the disease) like ninepins. 流感正在蔓延--传染的人越来越多.