and all across the northern hemisphere the broad leaves are hard at work. 所有北半球的阔叶树木努力生长
spring is arriving in the northern hemisphere. 北半球的春天却来了
The northern forest may be the largest on Earth 地球北部的森林可能地球上最大的森林了
At the Taiga's northern extent the growing season can last for just one month a year. 在针叶林的北部区域 树木的一年内的生长时节只有1个月
All across the tropics, humpbacks are heading away from the Equator towards the rich temperate seas of both the southern and the northern hemispheres. 横越热带 座头鲸调头离开赤道 走向富饶而气候温和的南半球和北半球海域
The northern flowering is mirrored by the grasslands of the southern hemisphere, 北方的开花季节跟南半球的草原互相呼应
They have stayed here, braving the northern winter, 绒鸭没有迁徙到温暖的南方
At the northern extreme of our planet, 而在地球的北极
Across the northern hemisphere salmon, returning from the ocean to their spawning grounds, 鲑鱼穿越整个北半球 从海洋回到它们的产卵地