Language points
1. survive vi. 幸存,生还,比……活得长 n. 幸存者 survivor eg. The custom has survived for thousands of years. vt. 从……中逃生,经历……后继续存在 eg. Only two people survived the fire. 经过这次地震,三分之二的人活了下来。 Two-thirds of the people survived the earthquake.