to protect
to support
police
watchful
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→bao3chi2jing3ti4 • bǎochíjǐngtì
to maintain vigilance
maintain vigilance, maintaining vigilance, maintains vigilance, maintained vigilance, to stay alert, stay alert
我們 必須 保持警惕， 避免 被 騙。
We must maintain vigilance to avoid being scammed.
在 網路 上 也 要 保持警惕。
You should also maintain vigilance online.
在 危險 地區，應該 保持警惕。
In dangerous areas, you should maintain vigilance.