The fluorescence of fluorene on both the solid surface were not observed which should need the further investigation.

芴的固体表面荧光未曾观测到，原因有待于进一步研究。

youdao

The fluorescence of fluorene on both the solid surface were not observed which should need the further investigation.

芴的固体表面荧光未曾观测到，原因有待于进一步研究。

youdao