convex function 凸函数;
iteration 迭代;
gradient descent 梯度下降;
repeatedly 重复;
carry out 执行;
convention 约定;
variable 变量;
derivative term 导数;(dw)
slope 斜率;
add 加(plus),subtract 减, multiply 乘, divide 除;
positive 正的, negative 负的;
equal 等于;
vectorization 向量化;
column 列;
matrix 矩阵;
for-loop for循环;
calculus 微积分。