我的同事中有一位理学士,他承担着物理和化学等课程的教学。那天放学的时候,我从这位上了年岁的学士的教室旁经过,由教室门口望进去,学士的课也正好讲完了。不过,他却依然站在讲台前,正对学生们解说着什么。讲台上放着大理石碎屑、盐酸瓶、试杯和玻璃管,蜡烛也还在燃烧着。学士把手中的试杯慢慢倾斜下去,二氧化碳从试杯与玻璃盖之间逸了出来,蜡烛的火焰像 Among my colleagues is a Bachelor of Science who undertakes the teaching of physics and chemistry. When I was out of school that day, I passed by the classroom of the old bachelor, looked through the door of the classroom, and the bachelor’s class was finished. However, he is still standing in front of the podium, is explaining what the students. There were marble crumbs, hydrochloric acid bottles, test cups and glass tubes on the rostrum, and the candles were still burning. Bachelor hands slowly tilting the test cup, carbon dioxide from the test cup and glass cover escaped between the flame like a candle