GbEng
这一章包含著作者论证的主要部分. This chapter contains the meat of the writer's argument.
他论证的要点是.... The burden of his argument was that...
他不根据前提推理因而论证无效. This non sequitur invalidates his argument.
就算你对,可你要论证这一点却非易事。 Grant that you are correct, you may find it hard to prove your point.
该书的缺点在於作者未能把论证展开. The book's weakness is the author's inability to sustain an argument.