https://www.youtube.com/watch?v=0BacEFy8ehk 0:57 we're standing right in the middle of one of the busiest sections in Mong kok in a ?? sea of people.
https://www.youtube.com/watch?v=aEyfshozlwE 0:10 a sea of supporters
練習問題解答
a-7090 a sea of protesters