How planetary nebulae can form such complex structures, however, is a hot debate among professional astronomers such as Jacoby.
然而,关于行星星云如何形成这么复杂的结构,却在Jacoby等专业天文学家中引发了一场热烈的争论。
Students debate whether the PGA was wrong in not allowing a disabled golfer, Casey Martin, to use a golf cart during professional tournaments.
学生们辩论美国PGA在这件事上的做法是否错误——不允许残疾人选手Casey Martin在职业巡回赛中使用球具手推车。
Summary of Background Data. The effectiveness and costs associated with spinal surgery have been a topic of significant debate in both the popular press and professional literature.
背景资料概述:与脊柱手术相关的有效性和经济费用,无论在通俗读物还是在专业书籍中都已经成为一个很有争议的话题。
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