"pile on" in Chinese (Simplified)
叠加群起攻击（比喻）
Definition
指在已经存在的事物上继续增加，尤其是问题、批评或负面关注。也可以指越来越多的人一起批评或指责某人。
Usage Notes (Chinese (Simplified))
通常为非正式用语，多用于形容问题、批评或压力加重（如“piling on the criticism”）。常带有不公平的意味，指许多人一起批评。偶尔字面意思（堆积实物），更多用于比喻。与“pile up”（自然而然堆积）不同。
Examples
Please don't pile on more homework; I already have too much.
请不要再**叠加**作业了，我已经有太多了。
The media began to pile on the politician after the scandal.
丑闻曝光后，媒体开始**群起攻击**那位政治家。
More and more problems just seemed to pile on this week.
这一周似乎问题**叠加**了越来越多。
Everyone started to pile on with their complaints after the boss made that announcement.
老板宣布后，大家都开始**一齐抱怨**。
When one critic attacked the movie, others quickly piled on.
一个评论家攻击了这部电影，其他人很快也**跟着指责**。
Don't pile on—he already feels bad enough about his mistake.
别再**落井下石**了——他已经为错误很难受了。