Many sedimentary rocks contain such features as ripple marks, exactly like those we can see forming in sediments at the bottom of present-day lakes or shallow seas.

我们可以看到，现在的湖底或浅海底部的沉积物中形成了波痕。许多沉积岩都含有类似这种波痕的特征。

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Buffer extended the compressed air cooling and steam condensation of time, buffer automatic drainage function to avoid the liquid water in the bottom of the container sedimentary likely.

缓冲器延长了压缩空气冷却以及蒸气冷凝的时间，缓冲器的自动排水功能避免了液态水沉积在容器底部的可能。

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The idea on low strength request (relative to the strength of the pile shaft) to grouted body in sedimentary region at the pile bottom is clarified.

阐明了对桩底沉渣区灌浆体低强度(相对桩身强度)要求的概念。

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