点击下方单词,选择对的这个单词
名词
1. 原子An atom is the smallest amount of a substance that can take part in a chemical reaction.
1. (nontechnical usage) a tiny piece of anything
Synonym: moleculeparticlecorpusclemotespeck
2. (physics and chemistry) the smallest component of an element having the chemical properties of the element
多通过句子记忆单词,而不是单独死记硬背。