名词
中文翻译：投球环
同义词：
['base', 'pitch', 'mound', 'circle', 'ring', 'target']
例句：
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1.The baseball players are practicing their throws with the thrower ring.
棒球运动员正在用投球环练习投掷。
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2. The pitcher threw a perfect strike to the batter's plate.
投手投出了完美的一球，打到了击球员的本垒板。
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3.The catcher was standing in the circle, ready to make a diving catch.
捕手站在圈内，准备进行一次跳起接球。