At the same time, the American Law Institute--a group of judges, lawyers, and academics whose recommendations carry substantial weight—issued new guidelines for tort law stating that companies need not warn customers of obvious dangers or bombard them with a lengthy list of possible ones.
【词汇突破】institute 机构
substantial 实际的
bombard不断攻击;向...连续提出问题
lengthy冗长
【主干识别】the American Law Institute issued new guidelines