这实在很离奇，我忍不住咯咯笑了起来。It was so unreal that I broke into a fit of giggles.接着，她莫名其妙地咯咯笑了起来。And then, unaccountably, she giggled.他咯咯笑了笑。He gave a chortle....
Dopamine also plays a role in drug use and other addictive behaviors.多巴胺还在吸毒和其他成瘾行为中发挥着作用.The drug can reduce the frequency and severity of attacks.这种药能降低发病次数和严重程度.'I see anti-depressants as a lifestyle drug,' ...