ring forward

• 循环

ring forward的用法和样例：

例句

1. The primary cycle is moving the ball forward.
   主要的循环周期是把球向前送。
2. Colwell and Larry W.Esposito of the University of Colorado envision recycling of material between rings and ring moons.
   科罗拉多大学的寇维尔与艾斯波西托设想，这些物质会在环和环卫星之间循环利用。