Take food collecting, for example.

　　以收集食物為例。

　　Let's take Mount Etna for example.

　　讓我們以埃特納火山為例。

　　A colleague, for example?

　　比如說同事？

　　Humans cannot digest plants such as grass.

　　人不能消化草類植物。

　　Wild flowers such as primroses are becoming rare.

　　報春花之類的野花越來越稀罕了。

　　Opportunities such as this did not come every day.

　　這樣的機(jī)會不是天天都有的。