学无止境 -------- Knowledge is infinite

例句：
A: Mary, you are so versatile t and there is for you to read these books.
玛丽，你如此博学多才，没有必要读这些书了。
B: But you know knowledge is infinite.
但是，你知道学无止境的。

同义词：
Live and learn
There is no limit to edge

注释：
There is no need for sb. to do sth. 某人没有必要做某事