A COLLECTION OF GOOD WORDS
前沿
Frontiers
Science is a field which grows continuously with ever expanding frontiers.
科学是一个不断发展、不断开拓的领域。
Since the day of the air, the old frontiers are gone. When you think of the defense of England you no longer think of the chalk cliffs of Dover; you think of the Rhine.
自从天空出现的那天起，古老的边界就消失了。当你想到保卫英格兰时，你就不会再想到多佛的白垩悬崖;你会想到莱茵河。