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
Innate and adaptive immunity | immune system of human body lecture
B1
22:55
Kit Harington Answers the Web's Most Searched Questions | WIRED
B1
5:37
Coco - Remember Me (Lullaby) [Karaoke]
B1
1:24
Free Solo - Trailer | National Geographic
B1
2:28
Pronounce English Words Correctly! SILENT SYLLABLES 🤫
B1
21:13
Community
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
