The key of the ballastless track lies in the structure strength lateral stability stiffness uniformity elastic buffer and durability .

无碴 轨道结构设计的关键在于强度、横向稳定性、刚度均匀性、 减振性和耐久性。

In particular it 's often the case that you need to keep track of a buffer length or read a length of something .

特别是，当您需要 跟踪 缓冲 区长度或读取某个内容的长度时，通常就是这种情况。

Based on the biomechanics basics and the knowledge of the track and field the essay argued on the sprint skill periods and the term of leg drive the buffer after landing and so on .

运用运动生物力学的基本原理，结合 田径运动理论知识，对短跑的动作周期划分为后蹬、着地 缓冲等问题进行了剖析。