词汇网络: carbon
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5:19
The surprising way we can cool the planet - Elise Cutts
B2
7:49
Bagged Salad Shouldn’t Exist
B1
4:58
What Made The Bahamas’ "Atlantis" Rocks?
B1
5:48
How did NASA touch the Sun without melting?
B1
9:38
ENGLISH SPEECH | LEONARDO DiCAPRIO: Protecting Our Planet (English Subtitles)
"The frame of this professional racing bike is made entirely of carbon fiber."
B2
