问答题 5.  Some people may look lazy while they are really thinking, planning and researching. We should all remember that great scientific discoveries happened by chance.
【正确答案】 有些人在进行思考，制定计划或开展研究时，看似懒惰。我们都必须牢记：重大的科学发现是碰巧出现的。
【答案解析】 “while”意为同时。