英语翻译students who have not completed one term of study at the

students are not advised to file for permission to transfer until they have completed one term.
不建议学生们在完成一学期前申请转学
students （ who have not completed one term of study at the school） are not advised to file for permission to transfer until they have completed one term
不建议（还没有在此校完成一学期的）学生们在完成一学期前申请转学
students （who have not completed one term of study at the school （ that issued them their first I-20 ）） are not advised to file for permission to transfer until they have completed one term
不建议（还没有在（最开始给留学生办了I-20的那个）学校完成一学期的）学生们在完成一学期前申请转学