The principal fold age of the two "Indosinian geosynclines" is between the Middle and Late Eocene, which is marked by the regional flagrant unconformity below the Mengla Group and equivalent horizons.
这两个“印支地槽”的主要褶皱时代是中、晚始新世之交，以勐腊群及其相当层位之下的区域性巨大不整合为标志。
The principal advantage over the dual filter coherent detection is a four-fold reduction in bandwidth.
与双滤波器相干检波相比的主要优点是带宽减少了四分之三。
Unscrupulous practices have been singled out as principal culprits behind as much as 10-fold surge in home prices in Chinese cities over the past decade.
在过去的十年，中国城市的房价激励的实践已被挑选出来作为首要，高达10倍。
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