finger in the air
US /ˈfɪŋɡər ɪn ðə ɛr/
UK /ˈfɪŋɡə(r) ɪn ðə ɛə(r)/
成语
凭空猜测, 随意估计
a guess or estimate that is not based on any facts or real information
示例:
•
His prediction about the sales figures was just a finger in the air.
他对销售数据的预测只是凭空猜测。
•
We don't have enough data, so any estimate would be a finger in the air.
我们没有足够的数据，所以任何估计都将是凭空猜测。