The coded signal is received by satellite dish aerials.编码信号由碟形卫星天线接收。Dish aerials are highly directional.碟形卫星天线的定向性非常强。Are the ship's main radio transmitter aerials earthed and radars switched off?液货船上主无线电发射机天线已接地且雷...
She reached into the wardrobe and extracted another tracksuit.她伸手又从衣橱里取出一件运动服。She wore blue tracksuit bottoms.她穿了一件蓝色田径裤。I changed into a tracksuit.我换上一身运动装。...
Colorimetric determination method for free methionine was established , that is NTB method.首先建立了适用于大量菌种筛选工作的蛋氨酸的测定方法-NTB法.Fig. 5 Variation of furfural calibration curves in aniline acetate colorimetric method.图5醋酸苯胺比色法,糠...