What does the phrase "There's no use crying over spilled milk" imply?A. It is beneficial to dwell on past mistakes.B. It is wise to lament over things that cannot be undone.C. It is pointless to regret something that cannot be changed.D. It is necessary to cry when accidents happen.

本题考查对英语俗语含义的理解。解题思路是先明确俗语 “There's no use crying over spilled milk” 的常见释义，再将各选项内容与该释义进行对比分析。

• “There's no use crying over spilled milk” 是一个广为人知的英语俗语，其意思是“覆水难收，后悔无益”，也就是对于已经发生且无法改变的事情，后悔是没有意义的。
• 选项A “It is beneficial to dwell on past mistakes” 意思是“纠结于过去的错误是有益的”，这与俗语表达的意思相悖，俗语强调不要纠结无法改变的事，所以A选项错误。
• 选项B “It is wise to lament over things that cannot be undone” 意思是“为无法挽回的事情而哀叹是明智的”，而俗语认为这样做是没有用的，并非明智之举，所以B选项错误。
• 选项C “It is pointless to regret something that cannot be changed” 意思是“后悔无法改变的事情是没有意义的”，与俗语的含义一致，所以C选项正确。
• 选项D “It is necessary to cry when accidents happen” 意思是“当事故发生时哭泣是必要的”，俗语重点在于强调后悔的无用性，而非哭泣的必要性，所以D选项错误。