Picture a map with one area left blank inside its outline. The blank does not mean nothing is there. It means nobody has walked in and come back with a record of it. Unexplored is the name of that blank: the thing exists, and the looking has not happened yet. The word's second use keeps the blank and changes what it sits on — the blank is now a question in a report, and walking in means thinking it through.
可以想成地圖上一塊留白的區域。空白不代表那裡什麼都沒有。只是還沒有人走進去看過，也還沒有人把裡面畫下來。unexplored 說的就是這個狀態：東西在那裡，但「去看」這件事還沒發生。第二個意思只是把同一塊空白從土地搬到題目上。問題已經寫在報告裡了，只是還沒有人走進去把它想清楚。
From the word’s history
The word is built as un- + explored, so the core is simply the state of the exploring not having been done.
這個字的組成就是 un- 加上 explored。所以核心就是「探索這件事還沒發生」的狀態，跟今天的用法完全對得上。
Wiktionary etymology supplied in this packet: 'From un- + explored.'
登入就可以看每一支怎麼連回核心畫面。