本文应用可积的一类线性微分方程求出了非均质变截面弹性直杆振动问题的一个精确解，我们应用这一精确解验证了渐近解的精确度。
This paper gives an exact solution for free vibration of a physically nonuniform straight bar with varying section by the use of a class of integrable linear ordinary differential equation.
遗产分割把重心集中在创造积交最苛求的标准，哪里性质和精确是极限重要。
The division focuses on creating products meeting the most exacting standards, where quality and precision are of the utmost importance.
该结构不需要任何精确匹配的电阻就能达到高的共模抑制比，并且其带宽不受带宽增益积的限制。
It does not need any matched components to reach high CMRR and its bandwidth is not gain-bandwidth product limited.
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