例句與造句

1. If the opponent's home board is completely " closed " ( i . e . all six points are each occupied by two or more checkers ), there is no roll that will allow a player to enter a checker from the bar, and that player stops rolling and playing until at least one point becomes open ( occupied by one or zero checkers ) due to the opponent's moves.
2. It's difficult to find zero checker in a sentence. 用zero checker造句挺難的