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20
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Obama
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01:58
Christina Perri Grammy Awards 2011 - GRAMMYs Guided…
107
A2 Basic
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02:02
Mysterious Lights In The Sky Explained!
101
B2 High-Intermediate
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02:27
How Powerful is Nigeria?
100
B1 Intermediate
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02:10
Polymerase Chain Reaction (PCR)
77
B2 High-Intermediate
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02:50
Are Clouds Full Of Bacteria?
69
B2 High-Intermediate
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02:27
Overview of PCR Cloning
64
B2 High-Intermediate
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01:51
How Powerful is Jordan's King Abdullah II?
59
B1 Intermediate
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01:48
Cloning With Restriction Enzymes
37
B2 High-Intermediate
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02:46
Overview of Traditional Cloning
28
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Cheng-Hong Liu
100000206381273
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Hello~我是Cheng-Hong Liu!
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4490
Cheng-Hong Liu Collection
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5
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movie
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466
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https://www.voicetube.com/user/100000206381273