Mix in the butter when melted.

黄油化了再搀进去。

youdao

Melt the butter over a medium-low heat. When it is melted and bubbly, put in the flour.

用中低火把黄油加热。待黄油熔化起泡后，放入面粉。

《柯林斯英汉双解大词典》

youdao

When the snow melted that spring, every stream became an angry river that raced down the mountains tearing up trees and bringing destruction.

VOA: special.2009.06.06

The ice over the river had melted when he reached it.

VOA: special.2010.06.26

When banks melted down in the credit crisis, CME Group trumpeted its markets as transparent and stable.

FORBES: Anger Builds Over MF Global Mess - And Spells Trouble

The ash sandblasted all the surfaces of the aircraft and caused all four jet engines to cut out when the melted ash coated their interior.

BBC: Volcanic ash air shutdown the 'right' decision

Yet those products had some regulation and oversight and authorities still missed one of the biggest scams of all time when it all melted down in 2007-2008, socked American taxpayers with a multi-trillion dollar bill and vaporized some 10 million jobs.

FORBES: JOBS Act Will Open Door to Investment Scams