名词
中文翻译：投球机
同义词：
['pitching machine', 'pitching device例句：1. The pitching machine is used to test the pitch of a ball.（投球机用于测试球的飞行高度。）']
例句：
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1. The pitching machine is used to test the pitch of a ball.
投球机用于测试球的飞行高度。
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2.The pitching machine was designed to improve the accuracy of the pitching technique.
投球机设计用来提高投球的准确性。
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3.The pitching machine is an essential tool for baseball players to improve their skills.
投球机是棒球运动员提高技能的重要工具。