回肠胆结石梗阻可引起各种明显的临床征象.Obstruction of the ileum by stone leads to distinct clinical pictures.爱玛在她的这篇谈话中,始终注意着她, 看不出有什么了不起的爱情的征象.Emma watched her through the fluctuations of this speech, and saw no alarming symptoms of love....
Variational principles play an important role in the formulation of many problems of mathematical physics.变分原理现在许多数学物理的表述中起着重要作用.After studying differential calculus you will be able to solve these mathematical problems....
Pete got on his horse and started trotting across the field.皮特跨上马，开始在田野间小跑起来。The riders came trotting down the lane.这骑手骑着马在小路上慢跑.Alan took the reins and the small horse started trotting.艾伦抓住缰绳，小马开始慢跑起来。...