任何在结冰的湖面行走过、滑过冰或者玩过冰上掷石游戏的人都知道冰很滑，在上面行走需要点儿信心。

Anyone who has ever walked on a frozen lake, gone ice skating or tried curling knows that ice is slippery and that it takes practice to move with any kind of confidence.

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在特定比赛中瞄准的标志，例如冰上溜石游戏或掷圈游戏。

Sports games a mark aimed at in certain games, such as curling or quoits.

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