the part of a scene between the foreground and the background
双语例句
1
Achieving that would require moving large amounts of power over long distances, from the windy, lightly populated plains in the middle of the country to the coasts where many people live.
A method of trace and parameter measurement for flying objects is discussed with the GPS and telemetering technique over the range of middle and far distances.
本文采用GPS定位与遥测技术相结合的方法对中远程飞行器轨迹测量进行了研究。
3
The site selection of this project is in the middle of the print base, and both the distances apart from south entrance and north entrance of the base are about 1400 meters.