明清測天仪器之欧化 : 十七, 十八世纪传入中国的欧洲天文仪器技术及其历史地位 = The Europeanization of astronomical instruments in the Ming and Qing China /Ming Qing ce tian yi qi zhi Ou hua : shi qi, shi ba shi ji chuan ru Zhongguo de Ouzhou tian wen yi qi ji shu ji qi li shi di wei = The Eu
“ Just as there is no loss of basic energy in the universe, so no thought or action is without its effects, present or ultimate, seen or unseen, felt or unfelt. ” ― Norman Cousins