Deep test pits have shown that the floors of the rings are made of hardened limestone.
幽深的探坑里显示了这些层层的石柱环是由冷冰冰的石灰石制成的。
So far, she and her colleagues have only excavated two small test pits at the cave, which contained a number of stone artefacts, bone points, animal remains, shell beads and fish hooks.
到目前为止，她和她的团队仅在洞内的两个小型试点进行挖掘，她们出土了一些石器、骨骼器具、动物残骸、贝类和鱼钩。
Sump pits are very common in Canada and if you have one it's a good time to test its' operation and install the discharge hose outside (away from your house of course).
集水坑在加拿大非常常见。如果你家有集水坑，现在需要检查一下其运行情况，在外面装上泄水软管(当然要在你家外面喽！)
Plenty of oxidation etching pits are found on the surface of the specimen after the thermal fatigue test, and the surface principal crack is prone to propagate through these etching pits.
实验结果发现，试样表面出现大量的氧化腐蚀坑，表面主裂纹优先通过这些腐蚀坑扩展。
The significance of ditching ratio per ten thousand ton ores for open pits is given, and how to use this index to test productive capacity of stope is briefly discussed.
对露天矿万吨矿石开沟比的含义，及如何利用这一指标对采场生产能力进行检验，作了简要的论述。
The significance of ditching ratio per ten thousand ton ores for open pits is given, and how to use this index to test productive capacity of stope is briefly discussed.
对露天矿万吨矿石开沟比的含义，及如何利用这一指标对采场生产能力进行检验，作了简要的论述。
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