Definition: the parts, substances, etc. that something consists of Level: C2
科学家研究大气的组成成分。
Scientists study the ___composition of the atmosphere.
一位厨师详细讲解了每道菜肴的成分构成。
A chef explained the ___composition of each dish in detail.
化学分析揭示了该矿物样本的确切构成。
Chemical analysis revealed the exact ___composition of the mineral sample.
