In addition to the rigid three-dimensional conditions such as GPA, GRE and TOEFL, the application for American graduate students depends on the applicant's relevant professional project experience. In fact, the project experience here is ok whether it is scientific research or internship, but it should be noted that for the application of science and engineering, it is more advantageous to find a technical post that can really exercise your hands-on ability. In addition, you should choose scientific research or internship in combination with your future career goals and the types of projects you apply for. For students who want to study for a PhD in the future, it is better to do scientific research and send papers.