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20
、
Obama
Collected Videos
Added Video
Translated
1
videos
1
videos in total
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Folder
01:42
How Lasers Work (in theory)
1237
B1 Intermediate
Translator ：
Grothendieck
Reviewer ：
少少
Grothendieck
100000214255442
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Message
gogogo
Achievements
Collection
Time
0
23
Grothendieck Collection
有字幕的
1
useful
8
funny
7
english
17
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14
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104920
6
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