信封： MechanicalEngineeringDepartment DalianUniversityofTechnology Dalian116023 Liaoning,China November28,1999 Mr.WangXiming MechanicalEngineeringDepartment MassachusettsInstituteofTechnology Cambridge,Mass.02139 U.S.A.（寄信人） 正文： DearMr.Wang,...
2026-05-25
