to mull over

• 酝酿新的办法

  mull over new methods

• 酝酿技术革新

  mull over technical innovations

• 酝酿着战争

  mulling over the war

• 进行思想酝酿

  mull over ideology

• 经过群众充分酝酿

  go through ample consideration by the public

• 这个思想早已在他脑中酝酿成熟了。

  He had this idea a while ago after mulling it over in his head.

• 这个问题先要在小组里酝酿一下。

  This problem should first be mulled over by small groups for a while.