The letter still gives him a twinge when he thinks of it.他一想起那封信就会感到一阵刺痛。a twinge of guilt内疚He felt a twinge in his knee.他感到膝盖一阵剧痛。For a moment, Arnold felt a twinge of sympathy for Mr Wilson.有一瞬间，阿诺德对威尔逊先生心生同情。…the occa...
整数或字符串等基元类.A primitive class as integer or string.但是对于这些,我们并不需要元类.But we do not need metaclasses for that.然而在这次介绍中,我们将避免元类, 由于它们弊大于利.We will avoid metaclasses in this presentation, however, since they bring more problems...