Particle physicists fall into the stereotype of geek scientists - serious, distracted and wearing ties that look like socks.

粒子科学家被归为怪人那一类——一本正经，精神错乱，领带看起来像袜子。

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Considering the very short particle residence time in the free-fall reactor, air was directly used as carrier gas to study the fast pyrolysis and sulfur evolution of coal under oxidizing atmosphere.

充分利用煤颗粒在自由落下床反应器中停留时间短的特点，直接用空气做载气，对自由落下床反应器中煤在氧化性气氛下的快速热解行为和硫的变迁进行了研究。

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However, the standard Particle Swarm Optimization is easy to fall into local optimum, and slow convergence.

然而，标准粒子群算法存在容易陷入局部最优，后期收敛过慢等问题。

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In reality, no one has ever been able to drop an anti-apple and watch it fall down (or up), and the antimatter produced in particle colliders is so energetic that it is hard to examine with the tools of precision physics.

ECONOMIST: Antihydrogen atoms are captured for the first time