由于企业不再雇佣更多的工人，我们正处于一个恶性循环状态之中，这就是问题的所在。
Businesses, for their part, won't hire without more sales. So we're in a vicious cycle. The question is what to do about it.
在MSR框架结构下定义了密码协议的秘密性和认证性。3改进了协议模型和攻击者模型，主要解决了攻击者模型中出现的无限循环状态。
Under the MSR framework, the definitions about secrecy and authentication are proposed3 Protocol model and intruder model is improved to solve the infinite state of intruder model.
CO2在跨临界循环状态，气体冷却器中存在的温差大，更使它在热泵热水系统中得到了广泛的应用。
Underits trans-critical cycle, there appears a large temperature glide at the cooler rejection, which makes CO2 have a wide application in the water heater.
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