cross可以用做动词，例如：He crossed the road ；cross还可以用做名词，表示十字架。across用做介词，表示在一个物体的表面上穿过，例如：Can you swim across the river without any help?
across
基本字义
英[ə'krɒs] 美[ə'krɔs]
prep.穿过；横穿
adv.横过；在对面
双语例句
1.Tumbleweeds bounced across the highway, piling against barbed-wire fences.
风滚草飘过公路，堆积在路边的铁丝网护栏上。
2.I walked across the bridge.
我从大桥上走过。
3.I ran across the road.
我跑过了马路。
cross
基本字义
英[krɒs] 美[krɔs]
n.牧杖；（主教或男修道院长的曲柄）权杖
双语例句
1.Taylor fled at Goren's cross.
泰勒挥臂去打戈伦的横向传球。
2.Cross's interest heightened.
克罗斯越来越感兴趣。
3.Christ died on the cross.
基督被钉死在十字架上。