caution的形容词cautious；
cautiousadj.小心的；谨慎的
Employers may become overly cautious about taking on new staff.
雇主在雇用新职员时可能会变得过于谨慎。
The scientists are cautious about using enzyme therapy on humans
科学家们对在人身上使用酶疗法非常慎重。
Australia, put in to bat, made a cautious start.
轮到澳大利亚队出场击球，他们开始打得很谨慎。
