The fire engines were just pulling up, sirens blaring.消防车正要停下来，警报器发出刺耳的声音。She heard the sirens scream their unearthly wail.她听到警报器发出可怕的尖叫声。Police cars, their sirens wailing, accompanied the lorries.警车护送着大卡车，一路警笛长鸣。...
ObjectiveTo establish an identification method for Fritillaria by atomic absorption.目的建立利用原子吸收鉴别中药材贝母的方法.The purpose is to study the pharmacodynamics of the crude alkaloids from Fritillaria pallidiflora Schrenk ( FPA ) ....
Scientists test out theories by experiment.科学家用实验来检验理论.GBH tensile tests these parameters to one - off test out above parameters.GBH拉力 机是检测这些参数的仪器,可 一次性 测试出上述参数.I wanted to test out the televison set before I bought it.买...