查询词典 foreshocks

Even in areas where foreshocks are fairly common, there is no way of distinguishing a foreshock from an independent earthquake.

即使是在前震相当普遍的地区，也无法将前震与独立地震区分开来。

Through statistical analysis, it is demonstrated that the precursory wave related to the quiescent foreshock is more universal than the foreshocks.

统计表明，与寂静地震有关的前驱波比前震有更大的普遍性，出现的时间主要集中在主震前 7天之内，从一部分中等地震到特大地震之前都已观测到前驱波，这就说明大的脆性破裂之前，较小的缓慢破裂在自然界是存在的而且比较普遍。

Here there have been many culs-de-sac: searches for foreshocks, tilts, radon, electrical precursors and variations in velocity ratios of P-waves to S-waves have either failed or are at best unproven.

在这方面曾走进许多死胡同∶寻找前震、地倾斜、氡、电学的前兆，以及P-波或S-波速率的变化。但是，这些努力或者失败，或者在最好的情况下未能获得验证。

The result show there weren't M6.0 earthquakes beyond 4 years and M5.0 earthquakes beyond 2 year, the earthquake calmness is distinct in medium term; the M5.0 earthquakes intensified in short term, there were foreshocks in the epicenter region, in the same time, the fixed point precursor observational datum of Xinjiang appeared obvious short anomalies; and found a few imminent earthquak...

结果认为，6.8级地震前新疆6级地震平静4年多，5级地震平静2年，中期阶段地震平静显著；短期阶段5级地震显著增强，震源区出现前震活动，同时全疆定点前兆观测资料出现较为明显的短期异常并观测到少量的临震异常。不同孕震时段的异常特征是6.8级地震中短期预测的依据，因而也是当前经验预报的基础。

But no one has been able to identify which earthquakes are foreshocks.

但是，没有人能够识别哪些是地震，哪些是前震。

What we can do is raise building standardsand improve monitoring of foreshocks.

我们能做的就是提高建筑标准，改进地震前震的监测技术。

In California, about half of the biggest earthquakes were preceded by foreshocks; the other half were not.

在California，大约有一半的大地震有前震发生，另一半没有。

Other earthquake, so we don't know they're foreshocks until they actually become foreshocks.

地震并没有明显的区别，所以我们只有在更大地震发生后才能知道这些地震是否是更大地震的前震。

Other earthquake, so we don't know they're foreshocks until they actually become foreshocks.

地震并没有任何区别，所以，我们只有在大地震发生之后才知道这些地震就是大地震的前震。

Rarely, several earthquakes precede a larger earthquake, but they don't look any different than any other earthquake, so we don't know they're foreshocks until they actually become foreshocks.

很少有情况，几个地震之后会发生较大的地震，但他们与其他地震并没有明显的区别，所以我们只有在更大地震发生后才能知道这些地震是否是更大地震的前震。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。