front shear line

基本解释

The major systems come from the shear line of low-layer, the low trough of upper air and the ground stationary front.
主要影响系统来自低层切变线、高空低槽和地面静止锋；
The frontogenesis tilts the wet isentropic surface and produces significant positive vertical vorticity change in front of the frontal zone, which results in the fast development of shear line.
锋生使得湿等熵面倾斜，在锋区前侧产生显著的正垂直涡度变化，切变线得到快速发展。
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The liquefaction front, originating from the envelope of initial effective stress points, gradually approaches the failure line as the cyclic mobility proceeds as a function of plastic shear work.
液化面作为累积剪切功的函数，从初始应力点的包络线开始，随着循环活动性的进行，逐渐接近破坏线。