| 短语 | on guard |
| 释义 | on guard on duty to protect or defend something 站岗, 放哨; 值班。 ■ （亦作on one's guard）prepared for any contingency; vigilant 警惕, 提防; 警戒： we must be on guard against such temptation. 我们应警惕这种诱惑。 on guardwatchful 警惕；警戒 * The police warned people to be on guard for pickpockets during the Christmas rush. 警察警告人们在圣诞购物高潮时谨防小偷。 * Be always on guard against complacency. 要时时警惕自满情绪。on hand1. nearby; within reach 附近；在手头 * Do you happen to have any aspirin on hand? I seem to be getting a headache. 你身边有阿斯匹林吗？我似乎头痛。 * Alwaya have your dictionary on hand when you study. 学习时要随时将词典放在手边。2. present 出席；在场 * You'd better wait here so you'll be on hand when you're needed. 你最好在这儿等着，以便需要你的时候你在场。 * Mr. Baker's secretary is always on hand when he appears in public. 贝克先生出现在公众面前时，他的秘书总是在场。3. in stock; available 现有（存货） * We have some new woollen goods on hand. 我们现有一些新羊毛织品。 * The department store has a large stock of goods on hand. 这家百货商店现有大量存货。on guard在岗上;提防着;戒备着;预防：We are told to be on guard against catching cold and influenza when we go out，especially old men and children.我们被告知，出去时要预防伤风感冒，特别是老年人和儿童。 |
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