used to describe technology, a product, etc. that has been developed and improved since it first appeared (技术、产品等)第二代的,改进型的◆Second-generation e-learning no longer just provides information, but instead forces the student to make choices and decisions. 第二代网络教学系统已经不再是仅仅提供信息,而是迫使学生作出选择和决定。
( 2G) used to describe mobile telephone networks without wires that were the first to use digital technology 第二代的(指首次使用数字技术的第二代移动通讯网络)◆second-generation cellphones 第二代手机