vi.开花；[化]风化；（物体表面）起霜

The crack of crack inflected the stability of the Grotto, and the effect of water prick up the effloresce of the cultural relics in the Grotto. 裂隙发育影响了石窟的稳定性,水的活动加剧了石窟文物的风化。

ATM is a white crystalline power,easily effloresce in air,Slightly soluble in water,Soluble in ammonia water and alkalies. 四钼酸铵为白色结晶性粉末，在空气中易风化，微溶于水，溶于碱和氨水。