This may be a precursor of what astronomers refer to as the common envelope phase, a short-lived period of a binary star's existence that is thought to last for just a few thousand years.
这可能是天文学家们提到的共包层阶段的前身，这是双星生命中的短期阶段被认为仅持续几千年。
Envelope analysis is an efficient approach to analyze the compound signal which is common in machinery fault signal.
对机械故障中常见的调制信号，包络分析法是一种有效的分析方法。
Triaxial compression test with the remolded deep clay shows that its fraction Angle is lower than that of the common shallow clay, and the strength envelope deflects with high confining stress.
对深部黏土重塑土的常规三轴试验表明，其内摩擦角较一般浅层黏土低，而且在高围压下强度包线出现向下的转折。
An answer to a common question: you can submit your portfolio in an envelope, a folder with pockets, or a ring binder.
一个常见问题的答案：你可以将文件夹放在信封内、有袋的文件夹内、或是活页本内缴交。
An answer to a common question: you can submit your portfolio in an envelope, a folder with pockets, or a ring binder.
一个常见问题的答案：你可以将文件夹放在信封内、有袋的文件夹内、或是活页本内缴交。
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