结果：不同产地、不同品种的进口花岗岩石材样品中天然放射性核素的比活度与普通建筑材料比有较大差别。

The specific activities of natural radionuclides in import granites of different producing area and different varieties have biggish differences with those in normal building materials.

youdao

结果：不同产地、不同品种的进口花岗岩石材样品中天然放射性核素的比活度与普通建筑材料比有较大差别。

The specific activities of natural radionuclides in import granites of different producing area and different varieties have biggish differences with those in normal building materials.

youdao