precaution

Compared meaning: an action or measure taken to prevent harm (noun).

比较义项：预防措施，保护性措施（名词）。

• precaution 本词

  A specific preventive action taken beforehand against a foreseeable danger; often singular, used with 'take' or 'as a precaution'.

  指事先针对可预见的危险而采取的具体预防行为；常用单数形式，与 take 或 as a precaution 搭配。

  She always carries a spare key as a precaution against getting locked out.

  她总是带一把备用钥匙，以防被锁在门外。

• safeguard

  An ongoing protective measure, system or device that guards something continuously; can also be a verb meaning to protect, often with 'against'.

  指持续起保护作用的措施、制度或装置；也可作动词，意为保护，常与 against 搭配。

  The new law is a safeguard against unfair treatment of workers.

  这项新法律是防止工人受到不公平待遇的一项保障措施。

Both words describe a measure taken to prevent something bad. Precaution stresses one action taken beforehand against a specific danger, often with 'take' or 'as a precaution'. Safeguard stresses an ongoing system or device that protects, and is also used as a verb.

两者都指为防止不良后果而采取的措施，但 precaution 强调事先的、针对特定危险的预防行为，safeguard 强调持续存在、起保护作用的制度或装置。precaution 常与 take、as a 搭配，safeguard 常作及物动词或与 against 搭配使用。