The video owner has disabled playback on external websites.
This video is no longer available on YouTube.
This video cannot be played right now.
Watch on YouTube
Mars 101 | National Geographic
学习统计
CEFR 等级
难度
字幕 (77 片段)
[Music]
to the ancient romans the planet mars
was symbolic of blood
and war
but to many people today
the red planet may hold the key
for a bright new future for humanity
[Music]
the story of mars began about 4.5
billion years ago when gas and dust
swirl together to form the fourth planet
from the sun
mars is the second smallest planet in
the solar system with a diameter just
shy of the width of africa
in fact its entire surface area is
完整字幕可在视频播放器中查看
评论 (0)
登录后评论互动模式
测验
正确答案：
相关视频
BEST OF Parkour VS Normal People In Real Life
Hugh Grant Honors Richard Curtis | The 15th Governors Awards Presented By @ROLEX
Iguana vs Snakes | 4K UHD | Planet Earth II | BBC Earth
Seinfeld | Kramer Has Cubans Smuggled Into The Country | Throw Back TV
Deep Sea Exploration - 360 | Into Water
National Geographic
测验
正确答案：
观看视频时会出现测验
记忆技巧
来自此视频
免费开始学语言
