earnest instructions;untiringly teach;

Accept my sincere thanks for your kind instruction , which has left a lasting impression on me.
对您的谆谆教导, 我深表谢意,铭记不忘.
来源:互联网摘选We must never be unworthy of our teachers'untiring and sincere teachings.
我们决不要辜负老师的谆谆教导.
来源:《现代汉英综合大词典》
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