The outer ring contains the valence electrons.

排在外层的有价电子。

Inner ring and outer ring can therefore be mounted separately.

内圈和外圈可以因此被分开安装。

One integral flange on the outer ring and one loose flange ring.

外圈带一个整体式法兰和一个松配合法兰圈。

Scientists think material from the outer ring moves inward and slams into Iapetus.

科学家们认为光环外侧的物质向内移动并猛烈撞击“土卫八”。

Adjusting the Nest thermostat is easy: you simply rotate the outer ring up or down.

调整Nest恒温器的温度非常容易：只需将恒温器的外圈向上或向下旋转即可。