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单词
ballas
释义
WordReference Random House Unabridged Dictionary of American English © 2024
bal•las
(bal
′
əs),
USA pronunciation
n.
(
used with a sing. v.
)
[
Mineral.
]
Mineralogy
a spherical aggregate of small diamond crystals used for drilling and for various industrial purposes.
apparently variant of
balas
in phrase
balas ruby
spinel ruby,
balas
being taken to mean "spinel''
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更新时间:2025/7/23 12:40:00