It's rare to find a work of fiction that can be hysterically funny at some points, while deeply moving and disturbing at others. It's even more unusual to find such qualities in a work of non-fiction.
如果一部虚构作品能够做到时而歇斯底里的滑稽，时而引起深深感动和不安，已经不可多得，而在纪实性文学中这些特质更是千载难逢。
So the dynamic response of the plate girder bridge under moving loads are the problem which is concerned about all along, and also a project to be studied deeply.
同时，简支板梁桥又是小跨径桥梁最常用的桥型之一，因此，移动车辆荷载引起的简支板梁桥动力效应越来越被工程技术界所关注。
So the dynamic response of the plate girder bridge under moving loads are the problem which is concerned about all along, and also a project to be studied deeply.
同时，简支板梁桥又是小跨径桥梁最常用的桥型之一，因此，移动车辆荷载引起的简支板梁桥动力效应越来越被工程技术界所关注。
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