singletn.汗衫；单衬衣；单(谱)线singleturn extraction单圈引出singlet oxygen utilization单重态氧发生器singlet-triplet splitting单-三重态能量差singlet-triplet transition单态-三态转移singlet-triplet absorption单重态-三重态吸收singlet-singlet absorption单重态-单重态吸收singlet-triplet mixed state单重三重混合态singlet with overturned collar翻领衫singlet-singlet annihilation单重态-单重态湮灭