"You have to be careful about moving asteroids around in space," he adds, lest a deflection inadvertently steer Apophis toward Earth.
“对于在太空中移动小行星，你必须万分小心，”他补充说，否则一偏转却可能无意中使阿波菲斯朝向地球。
2
Weak absorptions space distribution of materials face are measured by photothermal optical-beam deflection technique. It provided a new method for measurement and research of weak absorptions.