采用高速气流碰撞法对TATB进行细化，借助SEM技术对超细TATB粒子形貌进行表征。
The ultrafine TATB particles are prepared by high-speed gas impacting method and the shape of ultrafine particles is detected by SEM technique.
气流向下落在地球表面，向外流动，相互碰撞，如此一来就形成上升气流。
This creates downward air currents. These downdrafts hit the surface of the planet, flow outward, and collide with each other, forming updrafts.
气流向下落在地球表面，向外流动，相互碰撞，如此一来就形成上升气流。
These downdrafts hit the surface of the planet, flow outward, and collide with each other, forming updrafts.
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