机经44-1
The science of astronomy was begun by amateur and today remains dependent on their contributions, which are incisive by virtue of being _____ by the a priori assumptions that often vitiate the work of professional research scientist.which are incisive 修饰their contribution, by virtue of .... the a priori assumption 是解释incisive, 那么that often 后面的从句是修饰的啥？thir contribution 还是a priori assumption?
答案是unencumbered, 这题要是that 修饰前面，我能理解这个答案，修饰后者，我就有点不能理解了。望各位指点。
另外，机经里的easy medium section的题做起来，逻辑是顺的，读起来也在舒适区，hard section里的题，感觉逻辑和自己的逻辑完全拧巴，句子读起来也不舒适，请问各位该作何训练？ that修饰的就是assumptions啊，业余爱好者的assumption没有妨碍他们的contribution，这些假设对于专业者却是有阻碍的。业余和专业的对立关系。
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