我的侄子是个垒球运动员，他是一个接球员？
我的表弟是个垒球运动员，他是一个接球员。
提示心肺功能作为优秀垒球运动员选材的一项重要指标，具有实际意义。
This indicate that the cardiopulmonary functions can be an important index for the identification of talented baseball players and it is of practical importance.
以全国“萌牙杯”赛的垒球运动员为对象，观察心肺功能与运动成绩之间的关系。
The relationship between cardiopulmonary functions of the children baseball players and their sport achievements were studied.
信函作者还宣称，若干个大城市中的青少年联赛垒球运动员在接受某项研究的访谈中说，他们承受着来自教练和家长们的赢球压力。
The writer also claims that youth league softball players in several major cities reported psychological pressure from coaches and parents to win games when interviewed for a study.
纵观这些有助于提高击球速度的因素，力量教练要用具备的科学研究信息去帮助棒球或垒球运动员增强其击球速度制定抗阻训练方案。
Moreover, the use of additional resistance worn on the forearm while swinging a baseball bat did not contribute to further increases in instantaneous bat swing velocity and batted-ball velocity.
纵观这些有助于提高击球速度的因素，力量教练要用具备的科学研究信息去帮助棒球或垒球运动员增强其击球速度制定抗阻训练方案。
Moreover, the use of additional resistance worn on the forearm while swinging a baseball bat did not contribute to further increases in instantaneous bat swing velocity and batted-ball velocity.
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