They may be wise to err on the side of caution.
他们宁可失之过于谨慎也不冒风险也许是明智的。
Overhanging rocks on one side made it dangerous, so that the grandfather was wise to warn Peter.
悬在外面的岩石很危险，所以爷爷对彼得的警告是明智的。
That's the second one on the right side—You have freedom! said the wise man, writing it down.
这是右边的第二个——你自由了！智者说着，把它写了下来。
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