有些脚垫放在前脚掌处，可以防止脚向前滑动。

Some foot cushioning products will sit under the ball of the foot to prevent the foot from sliding forward in the shoe.

youdao

面对此番景象你可以短暂的停留，好好欣赏他们，但记住要继续向前走因为公园最好的部分还在前方。

Stop briefly for a moment and take it all in if you must, but walk around them since the best part of the park is still ahead.

youdao

第二天早上汽车逐渐发动起来以后，因为除霜口调到最大，而除霜口吹向前挡风玻璃，因此(在前挡风玻璃上的)冰很快就融化了。

The ice melted quickly after the car was warmed up the next morning because the defrosting vent, which blows only on the front windshield, was turned on full force.

youdao

If that's all it knows, then in that scenario there is no building or anything else; it continues a trajectory both forward in time and backward in time, and it says that whatever seconds, one second before you set your clock to 0, it would've been on the ground.

如果是这样,在那种模式下,没有楼房或者别的什么,物体的运动轨迹可以沿时间可以向后延伸,也可以向前延伸,不管时间取什么值,在零点前一秒时,物体就在地面上

耶鲁公开课 - 基础物理课程节选