Translation1. 这对双胞胎兄弟看起来相像，但是性格不同。(differ in) The twin brothers look alike, but they differ in character.2. 当他通过这次考试时，他所有的努力最后都得到了回报。(pay) All his hard work finally paid off when he passed the exam.3. 不要被实验中的一个小失败而搞得沮丧，再试一遍。(cast down) Dont let yourself be cast down by a small failure in the experiment. Try again!4. 他强烈反对在公共场所抽烟。(objection) He has a strong objection to smoking in public.5. 这些政策对于克隆研究有着巨大的影响。(have an impact on) These policies have a great impact on research into cloning.