高位泥炭沼泽形成的煤可选性好，而低位泥炭沼泽形成的煤可选性差。
The washability of coal deposited in high peat bogs is better than that deposited in low peat moors.
随着海拔的升高，沼泽中形成了又窄又深的水渠。
As elevation increases, narrow, deep channels of water form throughout the marsh.
它们体型巨大，有时有8英尺长，其中许多生活在沼泽地里，我们的煤层就是在这里形成的。
They were giant, sometimes 8 feet long , and many of them lived in the swampy pools in which our coal seam, or layer, or formed.
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