The scientists are cautious about using enzyme therapy on humans.

科学家们对于在人身上使用酶疗法持谨慎态度。

Many Canadians have become overly cautious when it comes to investing.

许多加拿大人在投资上变得过分谨慎。

He has been seen as a champion of a more cautious approach to economic reform.

他被认作是谨慎经济改革的拥倡者。

There may have been good reasons for this cautious attitude.

这种谨慎态度在当时也许是有理由的。