The grey shape resolved into a group of walkers.

灰色影子慢慢呈现为一群走路。

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

坡上凿出台阶使步行者下变得容易。

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

徒步旅行者可能无意中破坏鸟类生活脆弱环境。