“数一数二”，是夸赞他人的惯用词语，但若一味追求而脱离实际，则可能走向反面。
Global news & analysis
。关于这个话题，新收录的资料提供了深入分析
The prolog sublist/2 relation is not “good” from the perspective that it backtracks all the ways in which X is a sublist of Y. This is very reasonable however from the perspective that the core philosophy of logic programming is computation ~ proof search. There are many ways to prove one list is a sublist of another in the presence of duplicate elements.。新收录的资料对此有专业解读
return items[0];。关于这个话题，新收录的资料提供了深入分析