三光气作为剧毒的光气和双光气在合成中的替代物，不但毒性低，使用安全方便，而且反应条件温和、选择性好、收率高。

The triphosgene, being as the substitute for phosgene and diphosgene in synthesis, is not only low-toxic but also safe and convenient to use with mild conditions, good selectivity and high yields.

用扫描电镜和透射电镜观察低剂量双光气吸入中毒所致家兔呼吸系统损伤的超微结构改变。

Scanning electron microscope and transmissional electron microscope were used to observe the ultrastructural changes of respiratory tract in rabbits inhaling low concentration of diphosgene.

该方法用双（三 氯甲基）碳酸酯替代光气，从源头上大大降低了安全和环保隐患；

The method uses the bi-(trichloromethyl methyl) carbonate to replace phosgene so as to greatly reduce the safety and environmental protection risks from the source;

整体动物全呼吸道中毒的血液动力学改变与上呼吸道单独受双光气刺激所引起的血液动力学改变循相似规律。

While the intact rabbits were poisoned, they had the similar course of hemodynamic changes as that of those animals with upper respiratory tract irritated alone.