There's a lot of work piled up on my desk.
瞧我桌上堆了一堆的事。
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pile up，就相當于accumulate，即，堆積。
例句：
The clouds are piling up. 云愈積愈密。
One car made a sudden stop and the car behind it piled up.
一輛汽車突然剎車, 與后面跟著的那輛汽車相撞。
海納百川，有容乃大；壁立千仞，無欲則剛。