ERIC线上检索系统
ERIC dialog online retrieval system
对流层上层西风急流
Subtropical upper-tropospheric westerly jet
1998年冬季南海上层环流
SCS upper-layer circulation in the winter of 1998
操纵杆地上检验区段
lever ground verify segment
层上同调
cohomology with ceofficients in a sheaf
船中上层建筑
bridge-deck superstructure
大气的最上层
uppermost levels of the atmosphere