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To firmly keep in mind something important, emphasizing strong retention and adherence.
老师告诉我们要牢记历史教训。
The teacher told us to firmly remember the lessons of history.
要牢记自己的承诺，不能食言。
You must firmly keep your promises and not go back on your word.
Often used in educational, moral, or professional contexts to stress the importance of remembering key principles or lessons.
The phrase '要牢记' is often followed by a noun phrase indicating what should be remembered, e.g., '要牢记安全第一' (must firmly remember safety first).
Use '要牢记' when emphasizing the importance of remembering something with strong conviction, such as moral lessons, safety rules, or personal commitments.
The phrase combines '要' (yào, meaning 'must' or 'should') with '牢记' (láo jì, meaning 'to remember firmly'). '牢' originally meant 'strong' or 'firm' (as in a prison), while '记' means 'to remember'. Together, they emphasize strong retention of information.
Used in both written and spoken Chinese, often in formal or motivational contexts. The phrase implies not just passive memorization but active adherence to what is remembered.