noun 下载 🔗分享 倒三角算子，哈密顿算符 The symbol ∇ used to denote the gradient operator. Examples : "The professor explained that "dels are used to calculate gradients in physics problems." " 教授解释说，“倒三角算子（哈密顿算符）常被用于计算物理问题中的梯度。” math physics technical 与AI对话词汇游戏阅读练习
noun 下载 🔗分享 偏导符号，偏微分符号 The symbol ∂, in the context of a partial differential Examples : "In multivariable calculus, students often struggle to distinguish between regular derivatives and "dels", which represent partial derivatives with respect to specific variables. " 在多元微积分中，学生们经常难以区分普通导数和“偏导符号∂”，后者表示对特定变量的偏导数。 math technical physics 与AI对话词汇游戏阅读练习
noun 下载 🔗分享 部分，份。 A part, portion Examples : "Each of us must contribute dels of our time to the community project. " 我们每个人都必须贡献出自己一部分的时间来参与社区项目。 part amount 与AI对话词汇游戏阅读练习
