时势不好, 市面清得不成话.Times are bad, the market is dead as a doornail.他不仅是一位时势造成的英雄, 更是一种主要的历史动力.He was no mere creature of circumstance, but rather a prime moving force in history.我们应该顺应时势.We should take the world as we find it...
在实践中有三种方法来获得相位差.In practice there are three methods of accomplishing this phase difference.本论文的研究对象是相位差法超声波流量计.The intention of this article is phase difference ultrasonic flowmeter.信噪比高, 相位差小, 具有较高的动态分辨率.High signal to ...