The closed-ring system is proved to be steady.

闭环系统被证明是稳定的。

youdao

Closed elbow cuffs form almost a complete ring around the user's forearm.

袖口形成闭合肘几乎各地用户的前臂完成环。

youdao

Harry hurried over to the door leading to the spiral staircase, but his hand had only just closed upon the iron ring of the door when he heard running footsteps on the other side.

哈利匆匆跑向旋转楼梯的门，但他刚握住铁门环，就听见门的另一边传来奔跑的脚步声。

youdao

Mr Miliband urged the PM to stop any of the centres being closed by reinstating the ring-fence around their funding.

BBC: PMQs: UK to airlift 'thousands' of refugees from Libya