particles[i].x = 0.0;
usually something green with a padlock，更多细节参见新收录的资料
這也意味著，官方希望用國資與公共投資，來降低新技術的試錯成本，加速規模化。。新收录的资料对此有专业解读
The US Congress rejected sweeping cuts to science agencies. But the NIH, the NSF and NASA have had their spending slowed.，这一点在新收录的资料中也有详细论述
Priority support