1、Wang started playing baseball in fourth grade as a pitcher first baseman and outfielder.
王建民從小學(xué)四年級開始打棒球，擔(dān)任過投手、一壘手和外野手。

2、Now batting first baseman number21 Stan Ross.
現(xiàn)在擊球，一號壘手，21號，斯坦·羅斯。

3、Wang started playing baseball in fourth grade, as a pitcher, first baseman and outfielder.
王建民從小學(xué)四年級開始打棒球，擔(dān)任過投手、一壘手和外野手。

4、The first baseman made 15 putouts.
一壘手出局了15次。

5、First Baseman - A defensive fielder who plays on or near the first-base bag
一壘手：防御一壘壘包附近的內(nèi)野手。