have given their chicks a head start. 因而它们的宝宝也有了领先的优势

337. With the returning sun the eggs hatch.
     随着太阳的回归 蛋也开始孵化
338. Other birds have not even arrived.
     其它鸟还没有到来
339. but the Emperors by enduring the long black winter
     而帝企鹅却熬过了一个漫长黑暗的冬天
340. have given their chicks a head start.
     因而它们的宝宝也有了领先的优势
341. These youngsters are now ready and eager to make the most of the brief Antarctic summer.
     现在 这些小家伙们已经做好准备 急切盼望着享受南极那短暂的夏天
342. [The End]
     [本集结束]

来自《行星地球 第一季 第一集 Planet Earth S01E01 从北极到南极》第 340 行