Perhaps the sticks dry rub together in the wind and light 兴许是枯干的茎与茎被风刮得互相摩擦燃起来的。
2.
Testing coated fabrics - method 16 - methods for determination of colour fastness to wet and dry rubbing and determination of resistance to printwear 涂覆织物试验.方法16 .湿摩擦和干摩擦色牢度及印花耐磨损性测定方法