ball unfit for play

There is no penalty. However, the player may not again declare the ball (in the same condition) unfit for play.

这名球员不受处罚，但在同样的条件下，他不能再宣布这个球为不可打之球。

A player believes that his ball may have become unfit for play as a result of his previous stroke, but he is un-able to determine whether the ball is unfit due to a large piece of mud adhering to it.

一名球员认为因为之前所打的一杆，他的球已经不适合比赛，但因为有一大块泥附着在球上，所以他不确定自己的球是否不适合比赛。

A player damaged his ball at a certain hole, declared it unfit for play and substituted another ball.

一名球员在打一个球洞的时候损坏了球，他宣布球已经不适合再用来比赛，然后用另外一个球替换。