1.
cyclanic ,cyclenic or cyloterpenic ethers
环烷烃、环烯或环萜烯醚
2.
recirculation air
再循环[环流]空气
3.
Morphic Rings,PS-Rings,FS-Rings and Morita Context Rings
Morphic环与PS-环、FS-环和Morita Context环
4.
Having or consisting of rings or ringlike segments.
环状的，由环构成的有环或环形部分的，由环或环形部分构成的
5.
Random packings include conjugate ring, VSPring supper mini, pall ring, saddles and twin curved saddles.
功堆填料有共轭球、四内弧环、环、梯环、尔环、鞍环、弧环等.
6.
Random packings include conjugate ring, VSPring supper mini, pall ring ,saddles and twin curved saddles.
功堆填料有共轭球、八四内弧环、扁环、阶梯环、鲍尔环、矩鞍环、双弧环等.
7.
Environment Liaison Board
环境联络委员会(环联委)
8.
environmental management group
环境管理小组(环管小组)
9.
International Network for Environmental Management
国际环境管理网(环管网)
10.
Environment Coordination Board
环境协调委员会(环协委)
11.
ringed the door knocker with a wreath of holly.
用冬青花环来装饰门环
12.
Environment Policy Committee
环境政策委员会(环委会)
13.
waveguide circulator
波导循环器波导环行器
14.
festooning faults
成环疵点（布环成形不良）
15.
Environment Protection Agency
环境保护局(环保局)
16.
a rotary intersection
圆环交流 [环行交叉] 道
17.
Rotary intersection (roundabout)
环形交叉路口（圆环）
18.
open-loop control and closed-loop control
开环控制与闭环控制