As a subject matter expert in sports, particularly in the field of softball, I can provide you with an accurate explanation of the term "BA" in the context of this sport.

In softball, "BA" typically stands for Batting Average. Batting Average is a measure used in baseball and softball to quantify the performance of a batter. It is calculated by dividing the number of hits a batter has by the total number of at-bats. The formula for calculating BA is:

BA = Total Hits / At Bats

A higher batting average indicates a better performance at the plate. For example, a player with a .300 batting average gets a hit in 30 percent of their at-bats.

Now, let's translate that into Chinese:

在垒球运动中，“BA”通常代表击球率。击球率是用于量化棒球和垒球击球手表现的一个度量。它通过将击球手的安打数除以总打数来计算。计算BA的公式是：

BA = 安打数 / 打数

击球率越高，表示击球手在本垒板的表现越好。例如，一个击球率为.300的球员在他们的打数中有30%的机会打出安打。

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In baseball, the batting average (BA) is defined by the number of hits divided by at bats. It is usually reported to three decimal places and read without the decimal: A player with a batting average of .300 is "batting three-hundred."read more >>