casting lap

例句：

1. 1.The children were playing with the casting lap, making it spin around.
   孩子们正在用抛掷圈玩耍，让它旋转。
2. 2. The caster had to keep the casting lap in the air for a long time before it could be thrown.
   投手必须让抛掷圈在空中停留很长时间才能投掷。
3. 3. The casting lap was a popular game among children, and they loved to play it.
   抛掷圈是儿童们非常喜爱的游戏，他们非常喜欢玩这个游戏。