fizzle out

US /ˈfɪz.əl aʊt/
UK /ˈfɪz.əl aʊt/
"fizzle out" picture
1.

逐渐消失, 虎头蛇尾, 失败

to end or fail in a weak or disappointing way after a promising start

:
The protest movement seemed to fizzle out after a few weeks.
抗议运动在几周后似乎逐渐消失了。
Their initial enthusiasm for the project began to fizzle out.
他们对这个项目的最初热情开始逐渐消退