这些颗粒的大小变化范围，从粗粉砂级到砂级或细砂级。
这些颗粒的大小变化范围是从粗粉砂级到砂级或细砂级。
These particles range from coarse silt to sand or pebble size.
粗砂粒组和粘粒组对芘的吸附能力较大，细砂粒组和粉砂粒组相对较小。
Thus coarse sand and clay had larger capacity for pyrene sorption.
吕家坨井田西翼部分区域八煤层顶板由正常的粉砂岩变为粗中砂岩，并有煤层变薄现象。
In the part of west flank of Lujiatuo minefield, the normal siltstone roof of coal seam 8 changed into coarse to medium-grained sandstone, and also had phenomenon of coal seam pinch-out.
吕家坨井田西翼部分区域八煤层顶板由正常的粉砂岩变为粗中砂岩，并有煤层变薄现象。
In the part of west flank of Lujiatuo minefield, the normal siltstone roof of coal seam 8 changed into coarse to medium-grained sandstone, and also had phenomenon of coal seam pinch-out.
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