牢记 (láo jì): เพื่อเก็บไว้ในใจ

The teacher wrote the key exam points on the blackboard and told us to keep these formulas firmly in mind so that we could solve problems quickly during the exam.

My mother repeatedly reminded me that when I'm out and about, I must always keep safety first in mind and not easily trust strangers.

At the graduation ceremony, the principal hoped that we would keep our alma mater's motto firmly in mind and be an honest person on our future path.

He kept the doctor's advice firmly in mind, exercised every day, ate less greasy food, and gradually his health improved.

As volunteers, we must keep the purpose of serving others firmly in mind and patiently listen to each tourist's needs.