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。

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One of the most famous stories about Galileo is that he once dropped two metal balls off the Leaning Tower of Pisa to prove that heavier objects do not fall faster than lighter ones.

关于伽利略有一个著名的故事：有一次他从比萨斜塔扔下两个铁球，想要证明较重的物体并不较轻的物体下落速度快。

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The strength design of the tower crane structure is mainly to ensure that the metal structure part meets the strength condition in the work process.

塔式起重机结构的强度设计主要是确保金属结构部分在工作过程中满足强度条件。

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This year the FRC robots competed by throwing frisbees through slots and climbing a metal tower.

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Magna is two years ahead of competitors such as Dana and Tower Automotive in the latest metal-bending art, high-pressure hydroforming.

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Inside a metal-clad tower at the gas technology Institute in suburban Des Plaines, Ill. sits a narrow, 40-foot steel tube bristling with instrumentation ports and pressurized pipes.

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