To offer one's utmost loyalty and candid advice; to serve with devotion and sincerity.
他在团队讨论中纳忠效信，为项目的顺利推进提供了许多宝贵的建议。
In the team discussion, he offered his utmost loyalty and candid advice, providing many valuable suggestions for the smooth progress of the project.
Era:
Ancient
Frequency:
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