今天一早，一枚“德尔塔”Ⅱ型火箭在卡纳维拉尔角发射升空。A Delta II rocket was launched from Cape Canaveral early this morning.戴维发誓要离开这个项目，我不得不对他表示钦佩。I had to admire David's vow that he would leave the programme.西尔维娅手里拿着相机问道：“我们先去哪里？”Sylvia, ca...
Both quantum mechanics and chaos theory suggest a world constantly in flux.量子力学和混沌理论都表明世界永远处于不断变化中。The market is in a constant state of flux.市场行情在不断变化.Events are in a state of flux.事情在不断变化中....
果酸存在于植物之中,可入药.Fruit acid existing in foliage can be used as medicine.这种草可入药.The grass can act as a drug.牛蒡为菊科牛蒡属两年生植物,其根 、 茎叶和果实均可入药.The roots, petioles and seeds of Arctium lappa L . ( compositae ) are used to different...