code snippets [koʊd ˈsnɪpəts] ：代码片段
collective name：统称
hidden [ˈhɪdn]：adj 隐藏的
well-known facts：众所周知的事实
prince [prɪns]：王子
princess [ˈprɪnses] ：公主
royal family：王室
closer together：靠的更近
close：v 关，关闭；adv 接近；靠近（熟词僻义）
lets us assume [əˈsjuːm] ：让我们假设
bolded word ：加粗的词
bold [boʊld] ：n 粗体
independent variable：自变量。An independent variable is the variable you manipulate or vary in an experimental study to explore its effects. It’s called “independent” because it’s not influenced by any other variables in the study.（自变量是您在实验研究中操纵或改变以探索其影响的变量。它被称为“独立”，因为它不受研究中任何其他变量的影响）
dependent variable：因变量。A dependent variable is the variable that changes as a result of the independent variable manipulation.it “depends” on your independent variable（因变量是由于自变量操作而发生变化的变量，它依赖于自变量）
robust model in machine learning：a model is considered to be robust if its output dependent variable (label) is consistently accurate even if one or more of the input independent variables (features) or assumptions are drastically changed due to unforeseen circumstances.（即使一个或多个输入自变量（特征）或假设由于不可预见的情况发生巨大变化，如果模型的输出因变量（标签）始终准确，则该模型被认为是稳健的）
