when something is difficult to learn, usually quickly
当某事很难学习，通常是迅速的 (dang mou shi hen nan xuexi, tongchang shi xunsu de)
"The new software had a steep learning curve, but I managed to understand it."
"新软件有一个陡峭的学习曲线，但我设法理解了它。" (xin ruanjian you yige **douqiao de xuexi quxian**, dan wo shefa lijie le ta.)
