Srd
abbr. single radial diffusion 单向扩散; super red dust (tea) 特级红粉（茶）
🗣️ 情景例句
This is sensational!
太令人激赏了！
You've no ideas how much work there is.
你想象不到工作量有多大。
and we have only to turn to that extraordinary discovery of echo-location in bats to see a case in which the voice plays a strictly utilitarian role.
我们只要看一看蝙蝠回声定位这一极不寻常的发现，就可以探究一下声音在什么情况下有绝对的实用价值。