For frothy land prices the calculations are pretty simple - how fast are land prices rising compared to property prices?
关于地价泡沫的计算也很简单——相比于房价，地价的上涨速度有多快？
A simple and approximate analytical method for calculations of compressible potential flows in arbitrary two-dimensional and axially symmetric slender nozzles is given using perturbation technique.
本文应用摄动法给出了一种简便的计算任意二元和轴对称细长喷管可压缩有势流动的近似解析方法。
A simple expression for calculating the critical wind speed to excite the galloping oscillation of the structure was formulated, and exemplified by calculations.
提出了一个新的求弛振的临界风速计算的简便公式，并给出了算例。
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