Highly application of GIS to urban traffic pollution management has been developed, which consisted of proscenium-GIS system, back stage-motor vehicle emission model and spatial data base.

开发了高层应用城市交通污染管理信息系统，由前台g IS系统、后台机动车排放模型、空间数据库三大部分构成。

youdao

The rocket is long and slender, and fatter on top because its second stage is thicker than its solid rocket motor-powered first stage.

火箭又长又细，上部有点粗，因为它的第二级比固体燃料火箭发动机驱动的第一级要厚。

youdao

A few weeks ago, her appearance at a motor show in the remote provincial capital of Nanchang (think Des Moines) caused such pandemonium that she had to flee the stage after just three minutes.

几周以前，她在一个偏远省会南昌（跟咱们衣阿华州得梅因似的）的现身造成巨大的轰动，以至于她不得不在3分钟后就退场。

youdao

J-1's first stage, and Nissan will complete a liquid-methane-fuelled motor that it has in the works for the second stage.

ECONOMIST: Sayonara, spaceflight?

Dr Baker reckons that costs can be cut if the launch rocket uses the satellite's guidance computer instead of having its own, and if the satellite's built-in rocket motor is bolstered to do the work now performed by a launch rocket's upper stage.

ECONOMIST: Space