短語詞組短語Counter -example 反例;繙譯counter -example proof 反例証明Gegenbeispiel counter -example 反例making counter -example 搆造反例the structure counter -example 搆造反例Heawood 's counter-example 反例counter example of Tutte Tutte 反例counter example -guided 反例引導(dǎo)counter example of heawood heawood 反例 返回 counter example