He died in unexplained circumstances.他死因不明。Soon after leaving Margate, for some unexplained reason, the train was brought to a standstill.离开马盖特不久，不知什么原因，火车突然停了下来。Soon after leaving Margate, for some unexplained reason, t...
他要有挑战性,能有一番作为的事业.He wants a career that offers a challenge.不过,近来一些事件也提醒人们注意不作为的风险.Yet there have also been recent reminders of the dangers of inaction.受托人违反信托义务可以是作为的,也可以是不作为的.A breach of trust can be active or passive....
物理学研究力学、热学 、 光学 、 声学和电学.Physics studies mechanics , heat, light, sound and electricity.这两个学生都做了不少电学实验.Both students have made quite a few experiments on electricity.从量子电动力学可以得出所有已知的电学 、 力学和化学定律.Out of quantum electrodyna...