梦寐以求[ mèng mèi yǐ qiú ]

⒈ 在睡觉做梦时都在寻求，形容心情迫切，强烈追求。例这一切，也正是鲁迅所梦寐以求并终生为之奋斗的！英long-cherished; crave sth.so that one even dreams about it; dream wistfully;