noun 下载 🔗分享 中子 A subatomic particle forming part of the nucleus of an atom and having no charge; it is a combination of an up quark and two down quarks. Examples : "The atom's nucleus contains protons and neutrons. " 原子核包含质子和中子,其中中子是一种不带电的亚原子粒子,由一个上夸克和两个下夸克组成。 physics element chemistry 与AI对话词汇游戏阅读练习