This paper introduces the basic concept of the B-mode gray scale ultrasonic image.
本文介绍了B型超声灰阶图像的基本概念。
When the experiment was done, basic investigations were done on security of using B-mode ultrasound.
在试验进行的同时，对B超使用的安全性做了基本调查。
B. Basic conditioning is very important to good hurdling.
基础训练对跨栏非常重要。
B. Basic conditioning is very important to good hurdling.
基础训练对跨栏非常重要。
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