My initial reaction was to refuse.

我最初的反应时拒绝。

You could observe through a little window the reaction of the subject inside the chamber.

你能通过一扇小窗户观察实验对象在室内的反映。

I had a bad reaction after my typhoid injection.

我注射伤寒针剂后产生了不良反应。

Their reaction to the joke is to laugh.

他们对这个笑话的反应是笑。

※The most normal and the most perfect human being is the one who most thoroughly addresses himself to the activity of his best powers ,gives himself most thoroughly to the world around him ,flings himself out into the midst of humanity ,and is so preoccu pied by his own beneficent reaction on the world that he is practically unconscious of a sep arate existence...  最正常、最完美的人就是那彻底投身于自己最擅长的活动的人，是那完全献身于周围世界的人，是和群众打成一片的人。他完全专心致志于他对世界的有利作用，以致于几乎意识不到自己与世界还存在距离……  Frences E .C. Willard. American Social activist   美国社会活动家拉德，F。E。C。