The horses laboured up the steep slope.

那些马费力地爬上了陡坡。

She watched his slow progress down the steep slope.

她望着他慢慢走下陡坡。

He was scrabbling for a foothold on the steep slope.

他在陡坡上到处试探，想找个蹬脚的地方。

He puffed up the steep slope.

他喘着气走上陡坡。

It's a rather steep slope.

这斜坡相当陡。