理论的运作：一火箭发动机推力对一个充满水的注射器，这产生的压力读数，就一连接压力计。
Theory Of Operation: a rocket engine thrusts against a water filled syringe. This produces pressure readings on a connected pressure gauge.
理论上，主要的家庭安全问题之一，是特定系统是否易受到阻碍，完全无法运作。
One of the main theoretical home-security concerns is whether or not a given system is vulnerable to being blocked from working altogether.
现代医学保健的理论很注重心理卫生，注重保持头脑的功能，因为人身一切器官内脏的运作，都是靠头脑指挥的。
The theory of modern medical health care attaches importance to the mental hygiene and maintain the functions of brain, for the operations of the body organs need to be directed by the brain.
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