These movements are controlled by the trainer with the metal-pointed stick.
训练员要用有锋利金属尖的长棒控制它的这种举动。
2
The stream of positive particles that meets the surge of electrons from the cloud often arises from a tall pointed structure such as a metal flagpole or a tower.
来自云层的电子流与正粒子流相遇，而这些正粒子流通常来自于高而尖的结构，如金属旗杆或塔。
3
"Essentially, if you pointed the camera directly at the metal keypad, it would show you the thermal fingerprint of you, the camera operator, rather than of the keypad itself," Meiklejohn says.