to waste a lot of time; to be time-consuming and protracted; to drag on for a long time
这个复杂的研究项目需要细致的规划，否则很容易旷日累时，难以取得实质性进展。
This complex research project requires meticulous planning; otherwise, it can easily become time-consuming and protracted, making it difficult to achieve substantial progress.
Era:
Ancient
Frequency:
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