on guard基本解释
警惕; 站岗; 防备…
on guard网络解释
1. on guard在线翻译
1. 站岗,值班：on foot 步行;在进行中 | onguard 站岗,值班 | on hand 现有;在手边;临近
2. 警惕,防范：on foot / / 步行 | onguard / / 警惕,防范 | on hand / / 在手边,临近
3. 站岗,警戒：on foot步行 | onguard站岗,警戒 | on purpose故意,有目的
on guard英英释义
adj
1. vigilant
e.g. on guard against con artists
must remain on your guard in such a situation
Synonym: on one's guard(p)upon one's guard(p)on your guard