Even better, keep wallets attached to a cord or chain that is fastened to a belt.
更好的办法是把钱包栓在绳子上或链子上，再系在皮带上。
The system required to deliver a vaccine is called the “cold chain,” so named for the set of facilities that keep a vaccine cold as it is distributed from the manufacturer to the people who need it.
这个系统需要一种被称之为“冷藏链”的东西，之所以如此命名是因为在把它从生产厂家分发到需求者的手中这个过程中需要一系列的冷藏疫苗的设备。
One thing to keep in mind here is that all these certificates and signatures were simply used to form a trust chain.
这里要记住的一点是所有这些证书和签名都简单地用来形成一个信任链。
The liquid vaccines they require are often temperamental, needing constant refrigeration and thus what is known as a "cold chain" to keep them in tip-top condition as they move from factory to clinic.
液状疫苗通常非常娇气，需要持续冷藏保存，于是在从工厂到诊所的过程中，疫苗都被保存在低温运输系统中享受一流的待遇。
During a nuclear fission chain reaction, the tubes heat up to extremely high temperatures, and the way to keep them safe turns out to also be the way to extract useful energy from them.
核裂变连锁反应发生时，导管被加热到极其高的温度，将热量安全导出则意味着可以提取裂变产生的可利用能量。
Secure an area, preferably within a high-walled region to keep bears and other predators away. Chain Link Fences need to be painted to prevent rusting.
找一块安全之地，最好是筑有高墙的地方，这样可以避开熊和其他掠食者；作栅栏的铁链要涂上油漆以防止生锈，要是还不放心的话，在夏天的时候记得用机油多涂几遍。
The system required to deliver a vaccine is called the "cold chain," so named for the set of facilities that keep a vaccine cold as it is distributed from the manufacturer to the people who need it.
这个系统需要一种被称之为“冷藏链”的东西，之所以如此命名是因为在把它从生产厂家分发到需求者的手中这个过程中需要一系列的冷藏疫苗的设备。
And a chain and a keep are nothing, compared to a woman's kiss.
而一条锁链和一座监狱与一个女人的吻来说却一无是处。
A chain and a keep are nothing, compared to a woman's kiss.
与女人的吻相比一条锁链、一座监狱都不算什么。
In this paper we suggest a two-sphere model in which we assume that there is internal motion between two spheres but they keep separation from each other for simplifying particle-chain in ERF.
为了具体分析这种关系，采用不分离但有相互运动的双球构成的系统去简化粒子链。
Facts have shown that if a chain-smoker suddenly quits smoking, he's more likely to have lung cancer than those who keep the habit.
事实证明，如果一个烟鬼突然戒烟，他患肺癌的几率高于那些保持的习惯。
Facts have shown that if a chain-smoker suddenly quits smoking, he's more likely to have lung cancer than those who keep the habit.
事实证明，如果一个烟鬼突然戒烟，他患肺癌的几率高于那些保持的习惯。
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