Most control system fall in the " closed-loop " classification.

This control may be closed loop or open loop.

控制可以是开环的也可以是闭环的.

The factory owner sprang the news of closedown on the workers, leaving hundreds of them helpless.

工厂老板突然向员工宣布工厂倒闭的消息, 让数百名员工旁徨无助.

The efforts on closedown and suspension of small sugar refineries, small saccharin refineries and small paper mills are also being carried out in steps.

关停小糖厂 、 小糖精厂、小造纸厂的工作也已逐步展开.

Those two processes are very closely interlinked.

那两个过程紧密相连。

The detention raised two distinct but closely linked questions.

这一拘留行为引发了两个互为独立但又密切相关的问题。

She looked at him closely to see if his evasiveness was intentional.

她端详着他，想要知道他是否故意回避。

All transport operations, whether by sea, rail or road, are closely monitored at all times.

所有的交通活动，无论是通过海路、铁路还是公路，都时刻受到密切监视。

He closely guarded her identity.

他对她的身份守口如瓶。

He had worked closely with the President during his governorship.

他在任州长期间与总统紧密合作。

If you look closely at many of the problems in society, you'll see evidence of racial discrimination.

仔细研究一下社会上的许多问题，就会发现种族歧视的证据。

The recipe for their drink is a closely guarded trade secret.

他们饮料的配方是严格保守的商业秘密。

She closely resembles her sister.

她和她姐姐很像。

She used to follow closely after him every place he went.

从前他走到哪里,她总是紧跟到哪里.

Several pages of closely reasoned argument preface her account of the war.

她那部关于战争的著述之前有几页论证严谨的序言.

They are closely interconnected.

他们彼此紧密地连系着.

All parts of the aircraft are closely scrutinised for signs of wear or damage.

飞机的所有部件都经过严密检查以确定是否有磨损或毀坏的迹象.

He is so closely hemmed in on all sides that I doubt whether he could escape even if he grew a pair of wings.

密密层层的天罗地网,我看他插翅难飞.

The golden rule in playing tennis is to watch the ball closely.

打网球最重要的一点就是紧盯着球.

He was closemouthed and didn't drop a hint.

他嘴很紧,不透一点风.

Conclusion Store TSH Serum need more large , and closeness, and low temperature.

:用于tsh血清的保存量要多 、 要密封管口 、 低温保存.