英語(yǔ)翻譯：

develop; open up; rubbings

例句：

1. 在〔美國(guó)〕西部拓荒時(shí)代的早期，＂redeye＂是在大部份的酒廊就有的非常普遍的酒。喝了過(guò)多就使眼睛充血了。
   In the early days, on the western frontier, red eye was the common alcoholic drink found in most saloons. Over-consumption made the eyes red!
2. 如果我們把才能和資源匯合起來(lái)，就能把太空這個(gè)尚未開(kāi)拓的疆域變成一個(gè)新的和平疆域。
   By pooling our talents and resources we can make space a new frontier of peace.
3. 頭幾年里，殖民地開(kāi)拓者覺(jué)得生活艱難。
   In the first few year, the colonizer find life difficult.