一壘的用法和樣例：
例句
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一壘打擊球手安全到達一壘的一擊；一壘打
A hit by which a batter reaches first base safely; a one-base hit. -
盧·格里克打一壘
Lou Gehrig played first base. -
內場，內野第一壘、第二壘、第三壘和被視為一個單位的游擊手的防守位置
The defensive positions of first base, second base, third base, and shortstop considered as a unit. -
跑壘者于第一壘上被刺殺出局。
The runner was retired put out at first base.
