atom
1.N-COUNT 可数名词原子 An atom is the smallest amount of a substance that can take part in a chemical reaction.
A methane molecule is composed of one carbon atom attached to four hydrogens.
甲烷分子由1个碳原子与4个氢原子构成。
A methane molecule is composed of one carbon atom attached to four hydrogens.
甲烷分子由1个碳原子与4个氢原子构成。
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