Ecological footprint
[生态]生态足迹
🧩 词语组成解析
ecological
[ˌekə'lɔdʒikəl]
adj. 生态（学）的;
footprint
[['futˌprint]]
n. 足迹\\n[计] 印迹
🗣️ 情景例句
Oh, I'm glad you like it.
哦，知道你喜欢，我很高兴。
Who is the governor of this state?
这个州的州长是谁？
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。