So even if you're in a noisy environment like this -- and we all spend a lot of time in places like this -- listen in the coffee bar to how many channels of sound can I hear?
即使你在一个像这样嘈杂的环境中-- 我们很多时间都生活在这样的环境中-- 在咖啡厅里听 你可以听到多少种声音？