keep your wits about you, have your wits about youv exprverbal expression: Phrase with special meaning functioning as verb--for example, "put their heads together," "come to an end."
(be alert)
保持警惕 bǎo chí jǐng tì
多加小心
No one has ever explored this part of the forest and we don't know what we'll find, so keep your wits about you.