他对危险时刻保持警惕。
The bank is alert to the danger.
该银行对这种危险有警觉。
We must be alert to the possibility of danger.
我们必须认识到危险的可能性。
For example, fear can alert us to possible danger.
例如,恐惧可以提醒我们可能存在的危险。
The guards were alert to any danger.
哨兵警惕着一切危险的情况。
We must be constantly alert to this danger.
对此,我们必须保持高度的警惕。
You must be alert to the hidden danger.
你必须对隐藏的危险保持警觉。
You must be alert to the hidden danger.
你必须对隐藏的危险保持警觉。
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