v.变坚韧；变健壮；变顽固
This experience will toughen her. 这次经历会让他变坚韧。
The company leader said that army life would toughen the recruits up. 连长说军队生活可以使新兵锻炼得更坚强。
All this mountain climbing will toughen the boys up. 这些爬山运动会把孩子们锻炼得身强体壮。
v.变坚韧；变健壮；变顽固
v.变坚韧；变健壮；变顽固
