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Indicates that something is absolutely necessary or obligatory; used to express strong necessity or requirement.
为了通过考试，你必须努力学习。
To pass the exam, you must study hard.
根据法律，你必须遵守交通规则。
By law, you must obey traffic rules.
Often used in formal contexts to emphasize obligation or necessity.
While '必须' is neutral, '务必' is more formal and emphasizes urgency.
'必须' is stronger than '需要' (need) and is used when something is non-negotiable.
Composed of '必' (must) and '须' (need), emphasizing strong necessity.
Commonly used in both spoken and written Chinese to express strong obligation or necessity. Often appears in instructions, rules, or formal contexts.