chemical origin的用法和樣例：
例句
- The origin of the universe is an ageless topic.
關於宇宙的起源的問題是個永恆的論題。 - Its origin dates back to remote antiquity.
它起源於遠古時期。
chemical origin的相關資料：
臨近單詞
chemical load
chemical
chemical substance in bamboo leaves
chemical enhanced primary treatment
Chemical Name and Formula Searching
chemical processing of chromite ore
chemically oxidative polymerization
chemically deposited photoconductor
Chemical Defense Research Department
chemical liquid-vapor infiltration
chemical fibre engineering institute
chemical composition of black liquor
