検索内容:
doubt; uncertainty / apprehension
I have doubt about what he's saying.
doubting; in doubt / apprehensive
He doubts his ability.
dubious; questionable
His actions are dubious.
geopolymer
Dudamikay is a type of geopolymer used in construction.
geoelectricity
Geoelectricity is an important component in soil research.
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