low-velocity zone

常见例句

Pseudo-Rayleigh wave at low frequency (high velocity)can be used for the computation of shear wave attenuation in virgin zone.
利用低频伪瑞利波（高速），能很好地估算原状地层的横波衰减。
The lowermost mantle layer is above the core mantle boundary (CMB) and composed of D" region and ultra-low velocity zone (ULVZ)."
地幔底层由具有高地震波速和高密度的D″区和超低速带（ULVZ）组成。
The most remarkable feature of the upper mantle is the low-velocity zone. as suggested by its name, this is a region in the upper mantle in which there is a decrease in the speed of seismic wave.
上地幔一个最显著的现象就是低速带，就像这个词名所表达的那样，在上地幔存在这么一个区域，在那里地震波波速会发生减慢。