crack open a nut 예문

• They only rarely have observed examples of true teaching, when one ape, usually a parent, corrects the fumbling attempts of a young ape to do something like crack open a nut.
• :: : : : Doesn't a rock, even not worked or processed, become a tool ( strictly speaking ) the instant it is used for something i . e . to crack open a nut ?-- blah blah ) 08 : 39, 1 March 2012 ( UTC)