用质量规格小的落球比用规格大的落球测试，其结果分布更集中，数据更精确。

When balls of small size were used, the test data is more accurate and its distribution is more concentrated.

youdao

用质量规格小的落球比用规格大的落球测试，其结果分布更集中，数据更精确。

When balls of small size were used, the test data is more accurate and its distribution is more concentrated.

youdao