"through the cracks" in Chinese (Simplified)
被忽視被遺漏
Definition
如果某事 "被忽視" 或 "被遺漏"，意思就是事情被意外地遺忘或沒注意到。
Usage Notes (Chinese (Simplified))
通常用来形容任务、信息或人因疏忽被漏掉，多见于组织或管理语境。属于口语表达，不能用在物理裂缝上。
Examples
Some emails sometimes slip through the cracks during busy days.
有些邮件在忙碌的时候会被**忽視**。
We don't want any student to fall through the cracks at school.
我们不希望任何学生在学校被**忽視**。
Make a list so nothing falls through the cracks.
列个清单，确保没有事情被**遗漏**。
If you have questions, ask right away—don't let them slip through the cracks.
如果有问题，赶紧问，别让问题被**忽視**。
Sorry, your request fell through the cracks—I just found it today.
不好意思，你的请求被我**遗漏**了——我是今天才发现的。
Every system has flaws, and sometimes things just fall through the cracks no matter how careful we are.
每个系统都有漏洞，有时再小心，也会有事**被忽視**。