a. 有责任心的, 负责的, 本着良心的【法】 凭良心做的, 有道德感的

◆记忆方法一：
词根词缀记忆法：conscientious a 有责任心的（con全部+sci+entious多…的→知道关心多→有责任心的）,sci=know, 表示“知道”

science/scientific/scientist/conscience/conscientious/conscious/unconscious/sense/sensitive/allergic/numb/consensus/commonsense/nonsense
记忆：
1. science [ 5saiEns] 词根scien, 知道；science, 知道的事理，科学 The society can’t develop without the improvement of science. 没有科学的进步社会就不能向前发展。
2. scientific [ saiEn5tifik ] adj. 科学的 So far the scientific ideas have rooted in the local people’s minds. 到目前为此科学观念已经植根于当地人的思想之中。
3. scientifically adv. 科学地 The problem was solved scientifically. 问题得到了科学的解决。
4. scientist [ 5saiEntist ] n. 科学家 There is no university without a scientist. 没有科学家就不能成为一所大学。
5. conscience [ 5kCnFEns ] n. 良心, 道德心 I have nothing to say. Conscience speaks for itself.我无话可说。良心是不用别人说好话的。 格言： Clean conscience laughs at false accusation.心底无私天地宽。
6. conscientious [ 7kCnFi5enFEs] adj. 尽责的 Any conscientious worker is welcome into our company. 我们公司欢迎任何一个尽责的工作人员。
7. conscious [ 5kCnFEs] adj. 有意识的, 有知觉的, 故意的 We are conscious of the importance of the environment. 我们意识到环境的重要性。
8. unconscious [ Qn5kCnFEs ] adj. 不省人事, 未发觉的, 无意识的 The boy fell off the tree unconscious. 男孩从树上摔下来不省人事。
9. sense [ sens ] n. 官能, 感觉, 判断力 I believe Mr. Li is a man of sense of duty. 我相信李先生是个有责任感的人。
10. sensitive [ 5sensitiv] adj. 敏感的, 灵敏的, 感光的 He is often sensitive to others’ response. 他对外界的反映很敏感。
11. consensus [ kEn5sensEs ] An opinion or position reached by a group as a whole or by majority will n. 一致同意, 多数人的意见, 舆论 The voters' consensus was that the measure should be adopted 投票人一致认为那条措施应该被采纳。
12. commonsense [ 9kCmEn`sens ] n. 常识 How could he be short of such a commonsense?他怎么可能缺少这样的赏识呢？
13. nonsense [ 5nCnsEns ] n. 胡说 That’s nonsense.胡说。
14. allergic [ E5lE:dVik] all-erg-ic 趣味联想：所有的二姐都过敏。adj. 过敏的, 患过敏症的 I am allergic to injection. 我对注射过敏。
15. numb [ nQm] adj. 麻木的 I found my toes numb with cold. 我发觉我的脚趾冻麻了。
另类阅读：
The man with a sense of duty is sensitive to any comments on his work. A scientist is a sensible man who may make scientific experiments about commonsense, sometimes even nonsense in people’s eyes. He based his judgment on science, not sense.