在这里的困难在于从增加的社会保障支出和下降的税收收入（通常都会伴随着衰退）中分离出财政刺激手段的影响。
The difficulty here is to isolate the effects of fiscal-stimulus measures from the rises in social-security spending and falls in tax revenues that naturally accompany recessions.
攻讦被定义为发表煽动性的、贬损或刺激的信息在公共论坛上，这个问题伴随着互联网的诞生就有了，尽管它的根基要追溯更远。
Trolling, defined as the act of posting inflammatory, derogatory or provocative messages in public forums, is a problem as old as the Internet itself, although its roots go much farther back.
但伴随着功能磁共振成像和穿颅磁刺激术这样的新技术手段出现，以及人类颅脑建模计划的实施，科学家们已经在努力破解人类神经的密码。
But with innovative tools like fMRI and transcranial magnetic stimulation, and projects that are re-engineering a model of a human brain, scientists are working hard on cracking the neural code.
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