In many ways, Brett and Bernard are polar opposites.在许多方面，布雷特和伯纳德截然不同。polar bears, denizens of the frozen north北极熊，在冰天雪地的北方生活的动物The parents' position is often the polar opposite of the child's.父母的观点常与孩子的完全相反。...
In his horn solo, he kept modulating from key to key.他在喇叭独奏时不断地变调.With PWM modulating technique, two high DC voltage controllable powers are generated.利用PWM调制技术, 分别得到两个可控的高压直流电源.Non - modulating valves are also controlle...