But an unexpected fact was noted: certain minerals (pitchblende, chalcolite, autunite) had a greater activity than might be expected on the basis of their uranium or thorium content.

• 但是一个意外的事实引起了我的注意：某些矿物质(沥青铀矿物质、铜铀云母或钙铀云母)的活性比根据其铀或针含量所判断的要高。