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
互动模式
测验
正确！
不太对。
正确答案：
相关视频
Light seconds, light years, light centuries: How to measure extreme distances - Yuan-Sen Ting
B1
5:29
The Godfather: Opening Scene (HD CLIP)
B1
3:23
Auli'i Cravalho - How Far I'll Go (Lyrics)
B1
3:42
This Star Wars Scene was Too VIOLENT for 80s Kids…
B1
3:17
The Most AMAZING Vanilla Cake Recipe
B1
6:58
PolyU ELC
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
