跨越的英文：
to step across
step over

参考例句：

Stride a Brook.
跨越一小溪

Arch：Curved structure that spans the opening between two piers or columns and supports loads from above.
拱:曲线形结构建筑，跨越两个石墩或圆柱之间的信道，可支撑来自上方的负载。

An overpass bridged the highway.
立交桥跨越高速公路。

A bridge straddles the river
一桥跨越大江。

They failed to bridge the chasm.
他们未能跨越这道鸿沟。

It is twenty-five miles across the fields to Salisbury.
跨越25英里的田野可到达索尔兹伯里。

The railroad gates debar people from crossing the tracks.
铁道的栅栏阻止行人跨越轨道。

Overcoming obstructions along the route of a sewer can introduce various problems.
管道线路跨越障碍会引起各种问题。

An unbridgeable chasm;unbridgeable differences.
无法跨越的峡谷;无法弥合的分歧

A wooden plank bridged the stream
一块木板跨越小溪之上为桥。

step是什么意思：
n. 脚步；步态，步伐；步骤；措施；阶段，等级；台阶，平台；舞步
v. 踩，踏；跨步，行走；跳舞；使成阶梯状

step by step welding
跨步焊法

It is a step class.
这是踏板操训练班。

They are not in step with the times.
他们跟不上时代的步伐。

across是什么意思：
prep. 在…对面,横越，触及，在···上在…各处；遍及
adv. 从这一边到另一边，在对面，成十字形，传达过来

Typhoon swept across the coast.
台风袭击了沿海地区。

Will you row me across?
你划船把我送过去行吗?

A route or path across or over.
横向路横越或横跨的路线或道路

over是什么意思：
adv. （倒）下；从一边到另一边；越过；再；结束
prep. 在…之上；越过；在…的另一边（对面）；由于；从一边到另一边
adj. 过去的；结束的；外面的；上面的
v. 越过

chew over; think over
考虑;详细讨论

I have failed over and over and over again in my life.
我一生中失败了一次又一次。

"Over shoes, over Boots"
一不做,二不休