translation.en: Charles Darwin believed that insects have emotion and express them in their behaviors, as he wrote in his 1872 monograph on the expression of the emotions in man and animals.
translation.zh: 查尔斯·达尔文认为昆虫是有情感的 并且有它们的情感表现方式 就像他在1872年出版的著作中关于人类与动物情感的表达方式的描写。