cross是动词或者名词, 动词时为穿过,交叉,碰见还有些别的意思比较少用, 比如I cross the street. 我穿过马路two lines crosses. 两条线交叉I cross her on the street. 我在路上碰到她。名词时有十字架,十字叉的意思, 比如,She wears a small silver cross on her neck, 她戴着一个银色小十字架的项链。across 则为介词或副词,意思都是穿过,交叉,但由于词性关系一定要和别的动词搭配使用,比如:I walk across the street, 我穿过马路。two lines cut across each other, 两条线交...