flighty

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It was amplified by newfangled, flighty financial techniques, notably buying assets with borrowed money and watching leverage work its arithmetical magic.
他被新颖而轻浮的金融操作所放大，尤其是人们借钱购置资产，并坐观金融杠杆发挥着数字魔术。
Set at the turn of the 19th century, in "Hayslope" during the Methodist revival, the story concerns Adam, a stern carpenter who is engaged to the pretty but flighty milkmaid, Hetty Sorrel.
该书写于 19 世纪末期，正值卫理公会教派复苏之时，主角亚当是一个不苟言笑的木匠，却娶了漂亮轻浮的挤奶工海蒂。
She was drawn to the scholastic and artistic crowds in high school but they rejected her point-blank, assuming either that she was a flighty airhead or was mocking the gawky students in those circles.
在高中时，她想和爱学习有艺术气质的人交朋友，但是他们断然拒绝接受她，因为他们想当然的认为她只是一个轻浮而且脑袋空空如也的傻瓜蛋，或者怀疑她在嘲笑他们圈里的学生们迟钝。

Even the strongest firm is a delicate combination of flighty clients and flightier talent.
ECONOMIST: UnfulPhilled
Hong Kong's investors are likely to fare better with boring insurance than with flighty internet stocks.
ECONOMIST: This year's biggest initial public offering
But because it did not rely on flighty capital markets for funds, it has weathered the downturn better.
ECONOMIST: Face value

(especially of a woman) not responsible and likely to change activities, jobs, boyfriends, etc. often

If you say that someone is flighty, you disapprove of them because they are not very serious or reliable and keep changing from one activity, idea, or partner to another.