Birds are the first to arrive in any numbers - 鸟类是所有宾客中率先到达的
Nearly half of all cubs die in their first year out on the ice. 大约有近一半的幼熊 会在第一年的冰上历险中丧生
Her cubs gaze out of their bright new world for the very first time. 它的幼熊们第一次注视着 这个明亮的新世界
but this steep slope is not the easiest place to take your first steps. 但在这个陡峭的斜坡上 踏出第一步可不太容易