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单词 raft
释义 raft
[raft]
ENGINEERING
A quantity of timber or lumber secured together by means of ropes, chains, or rods and used for transportation by floating.
GEOLOGY
1. A rock fragment caught up in a magma and drifting freely, more or less vertically.
2. See <<float coal>>
HYDROLOGY
An accumulation or jam of floating logs, driftwood, dislodged trees, or other debris, formed naturally in a stream by caving of the banks.
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