When they feel frightened, they roll up into a ball to protect themselves.

当它们感到害怕时，它们会蜷缩成一团来保护自己。

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American football is different from soccer, it needs the unique sets to protect the football players, because the rule allows the player to grab the ball and then hit other player to win the match.

美式足球是不同于英式足球，它需要独特的装备来保护球员，因为规则允许球员拿球，然后碰撞其他球员去赢得了比赛。

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Raise elbows to protect your ball when taking the rebound.

抢到篮板时抬起手肘来保护你的球。

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Often it will be your fellow back rowers arriving first and they need to be in the correct positions either side of the ball carrier to protect the ball and make it almost certain that it comes back on the right side.

BBC: Jeremy Guscott column

Carlesimo cautioned that the Nets would have to protect the ball, saying Brooklyn gave Chicago 80 points on 73 turnovers.

WSJ: Postseason goes to Brooklyn, and Noah may miss it

The public has also reacted to the fact that, knowing this problem existed, the Dodger organization failed to do what was necessary to protect those attending ball games from this serious threat to their safety.

FORBES: Suspect Arrested In Brutal Los Angeles Dodger Stadium Attack