Stone, wood, tree bark, clay, and sand are generally available materials.

石材，木材，树皮，泥土，沙，一般可用的材料。

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Producing rates for each well were generally limited by sand production.

每个以及一般是由砂生产有限的生产速率。

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Single sand body occurs generally as tabular mass or wide lens.

单砂体多呈板状和宽透镜状。

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Single sand body occurs generally as tabular mass or wide lens.

单砂体多呈板状和宽透镜状。

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