潮水小的时候强风可以让船只改变航向。Strong winds can turn boats when the tide is weak.舵手独自一人就能变换航向。The helmsman could tack the boat singlehanded.根据星辰确定航向to navigate by the stars...
目的建立利用原子吸收鉴别中药材贝母的方法.ObjectiveTo establish an identification method for Fritillaria by atomic absorption.结果: 处方中的黄芪 、 参、贝母三味药的薄层色谱具有鉴别特征.Results: Describable characteristics of Huangqi , Danshen , Tiandong and Zhebeimu b...
They were forcing her head under the icy waters, drowning her.他们用力把她的头按到冰冷的水中，想淹死她。He braced himself for the icy plunge into the black water.他做好了准备要跳进冰冷的脏水里。With characteristic rashness and valor, Peter plunged into the ...