Vast areas of our ocean are yet to be explored. 海洋中还有广阔的区域尚未探索
Since then, we've explored almost every part of the planet 自此 我们几乎探索了这个星球上的每处角落
a place few people have ever explored. 鲜少有人踏足
It's been ten years since we explored these wonders in the first series of Planet Earth. 自从我们在《行星地球》第一季中探寻了众多这样的奇迹以来 已经十年过去了
It's a vast wilderness and the least explored of all jungles. 辽阔,原始,也是最不被探索的原始森林之一
But with half the world's limestone still to be explored, 但世界上仍有一半石灰岩洞尚未被开发
Today caves remain the least explored places on Earth. 今天 洞穴仍是地球上 人类最少涉足的地方
Yet these depths were first explored only two years before man landed on the moon. 然而人类直到登月前两年 才第一次进入这个深渊