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
like the Victoria giant water lily with leaves two metres across. 譬如有着2米宽叶子的王莲
These botos are huge - two and a half metres long. 这些亚马逊江豚体型巨大 身长达2.5米
Each year nearly two million animals migrate across the Serengeti plains 每年都会有将近200万只角马 横越塞伦盖蒂平原
These spires are the eroded remains of an ancient seabed that once stretched between the two continents. 曾经连接两块大陆的古老海床 侵蚀后留下了一座座尖耸的山峰
Two miles up the crumbling precipices seem devoid of life. 两英里高的碎石崖上 似乎不可能有生命存在
the only food the cubs have known since they were born deaf and blind beneath the snow some two months ago. 自从熊崽们两个多月前又聋又瞎地 在雪下出生以来 母乳就是它们唯一的食物