本片介绍了地球几大板块的形成过程，非洲、欧亚、澳洲、美洲的形成。以及奇特的地理，生物面貌。
Sponsored
LINK SAFETY CHECK
Is that link safe?
Scan any URL for phishing & malware in seconds.
easyemailverification.com
EMAIL LIST CLEANUP
Stop bouncing emails.
Verify every address before you hit send.
