The grey shape resolved into a group of walkers.

灰色影子慢慢呈现为一群路人。

Steps cut in the hillside give walkers an easy passage down the mountain.

山坡上凿出台阶使步者下山变得容易。

Walkers can unwittingly damage the fragile environment in which the birds live.

徒步旅者可能无意中破坏鸟类生活脆弱环境。