Amateurs fall by the wayside when the going gets tough.

初学者们遇到困难就半途而废。

《柯林斯英汉双解大词典》

My book knowledge fell by the wayside as I thought about the basics of getting around, reading emails and talking with my classmates, I was often nervous at school, worried about whether the teachers would call on me in class and whether I'd understand their questions.

我一开始思考出行、阅读电子邮件和与同学交谈时，就会把书本知识置之脑后。我在学校里时常感到紧张，担心老师会不会在课上点我，担心自己能否理解老师的问题。

youdao

We will walk very, very slowly, and if we feel tired we can rest by the wayside.

我们会走得非常非常慢，如果我们感到累了，我们可以在路边休息。

youdao

Often times, they've been, you know, fallen by the wayside, and this time they were funny.

NPR: Democratic Presidential Hopefuls Take on Las Vegas

Unfortunately, when public pensions defend their investing decisions, truth may fall by the wayside.

FORBES: Public Pension Suckers For Private Equity

There are going to be airlines that go by the wayside in this recession.

FORBES: Round Table