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
B1 中级
英语
10:45
Educational
PCR (Polymerase Chain Reaction) Explained
学习统计
B1
CEFR 等级
5/10
难度
评论 (0)
登录后评论
还没有评论。成为第一个分享想法的人！
互动模式
测验
正确！
不太对。
正确答案：
相关视频
Alex Honnold: This is your path and you will pursue it with excellence
B1
1:10
Friends: Smelly Cat Music Video (Clip) | TBS
B1
1:39
Official Trailer: Othello with Rory Kinnear and Adrian Lester | National Theatre at Home
B1
0:50
Platform 9¾ | Harry Potter and the Philosopher's Stone
B1
3:22
The Nervous System, Part 1: Crash Course Anatomy & Physiology #8
B1
10:36
BOGObiology
测验
正确！
不太对。
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
