The plane-section assumption was not congruous in low strain dynamic tests on pipe piles, so the propagation of stress wave couldn't be expressed by 1D wave equation.

管桩低应变检测时，平截面假定并不满足，应力波的传播不能简单地用一维波动方程描述。

Journalistic media is a propeller to the social transformation and development, with its inborn vocation highly congruous with the concept of the harmonious society building.

新闻传媒是社会变革、发展的推进器，构建和谐社会理念与新闻传媒的天赋使命具有高度一致性。