the cleverest housewife cannot cook a meal without rice—one cannot make bricks without straw
巧妇难为无米之炊
a housewife,no matter how clever she is,can’t cook without rice;one can’t make bricks without straw; if you have no hand you can’t make a fist
巧妇难为无米之炊qiǎo fù nán wéi wú mǐ zhī chuī
再聪明能干的妇女,没有米也做不出饭来。比喻没有必备的条件,再聪明的人也很难做成事。one can’t make bricks without straw, You can’t make omelettes without breaking eggs. one can’t make silk purse out of a sow’s ear