2,These young scientists got their research's information by fieldwork3,The problem'll be solved as long as we keep working.6,These two animals look same, but they are different sorts.
1.The letter from that industry management engineer indicated that he was doubtful of the feasibility of the project.2.These young scientists obtain the foremost materials for the research by the pratical observation.3.The problem will be solved sooner or later,as long as we keep working hard.4.The author want to express his viewpoint on praise and criticism to the readers by this article.
