freebase

美 [ˈfriːbeɪs]英 [ˈfriːbeɪs]

freebase

noun

U精炼可卡因
a specially prepared form of the powerful illegal drug cocaine

1

Conclusion : From the experiment , we can conclude that formaldehyde can decrease anti-oxidative ability of mice and damage freebase or active oxygen clearing system , which can cause oxidative injury of lung tissue in mice .

本研究结果表明，通过亚慢性毒性实验，吸入一定浓度的甲醛，可明显降低肺组织的抗氧化能力，损伤自由基和活性氧的清除系统，导致肺部的氧化性损伤，引起肺组织病变。
2

In altered , more potent , cheaper forms ( freebase , crack ), cocaine is injected or smoked and is extremely addictive ( see drug addiction ) and detrimental to health .

古柯碱还可以注射法或化学烟雾法吸食，然上瘾性更强，对人体健康的伤害亦较大。