dur·ain 
(drān, dyr-)
(drān, dyr-)n.
A gray to brownish-black band in bituminous coal, characterized by a granular fracture and a dull luster.
[Latin dūrus, hard; see deru- in the Appendix of Indo-European roots + (FUS)AIN.]
| 单词 | durain |
| 释义 | dur·ain (drān, dyr-)n. A gray to brownish-black band in bituminous coal, characterized by a granular fracture and a dull luster. [Latin dūrus, hard; see deru- in the Appendix of Indo-European roots + (FUS)AIN.] |
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