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单词
durain
释义
WordReference Random House Unabridged Dictionary of American English © 2024
du•rain
(dŏŏr
′
ān, dyŏŏr
′
-),
USA pronunciation
n.
[
Mineral.
]
Mineralogy
the coal forming the dull layers in banded bituminous coal. Cf.
clarain, vitrain.
Latin
dūr
(
us
) hard +
-ain,
from
fusain,
by analysis as a suffix
1915–20
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更新时间:2025/11/16 11:51:30