guard against

guard against 是一个核心含义为“防范、提防”的短语动词，用于表示采取措施预防潜在危险、威胁或错误。它由动词 guard（保卫、警惕）和介词 against（对抗、防备）构成，强调主动防御的姿态，广泛应用于安全、健康、社会交往等多个领域。

基本结构

直接接名词：表示防范的具体对象

Security cameras have been installed to guard against poachers.（已安装安全摄像头监视偷猎者）

Miners wore a helmet as a guard against falling rocks.（矿工戴钢盔防护落石）

接抽象概念：如风险、疾病、不良行为等

A reporter tries to guard against inaccuracies by checking sources.（记者通过多方求证避免不实报道）

We should learn to guard against some illnesses from a young age.（应从小提防疾病）

常见搭配短语

be on guard against：强调保持警惕的状态

Be on your guard against pickpockets.（提防扒手）

The armed forces were on high alert to guard against retaliation.（武装部队高度戒备以防报复）

take measures to guard against：突出采取具体措施

We should take measures to guard against accidents.（应采取措施防止事故）

安全防范：

The police warned people to be on guard against burglary during the festival.（警方提醒假日提防盗窃）

人际警惕：

Be on guard against those who fawn upon you and bow obsequiously.（警惕阿谀奉承之人）

专业领域：

In scientific discussions, guard against subjectivism and arbitrariness.（科学讨论中严防主观武断）

This is an effective way to guard against malicious SQL injection.（这是抵御恶意SQL注入的有效方法）

prevent/avoid：prevent 侧重阻止某事发生，avoid 侧重避开结果，而 guard against 强调持续的防御姿态。

Correct mistakes if you have made any and guard against them if you have not.（有则改之，无则加勉）

watch out for：更口语化，如 Watch out for pickpockets，而 guard against 可用于正式语境。

无论是物理安全（如防自然灾害）、信息安全（如防诈骗），还是人际互动（如防虚伪），guard against 都强调主动防御的智慧。它提醒我们：真正的安全不仅是应对危机，更是在日常中筑起警惕的防线。你是否曾用这个短语描述过生活中的防范经历？