那些由于灼伤或是过度使用双手而导致指纹磨损的人常常感觉表皮光滑的指尖要抓紧任何东西几乎不太可能。
People whose fingerprints have worn off because of burns or overuse often find that the smooth calluses that develop on the fingertips make it nearly impossible to maintain a grip on anything.
交替练习，需要使用投掷臂的练习与那些压力较小的练习交替，提供了一些保护，防止过度磨损和撕裂。
Alternating drills that emphasize heavy usage of the throwing arm with those that are less stressful provides some protection against excessive wear and tear.
交替练习，需要使用投掷臂的练习与那些压力较小的练习交替，提供了一些保护，防止过度磨损和撕裂。
Alternating drills that emphasize heavy usage of the throwing arm with those that are less stressful provides some protection against excessive wear and tear.
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