It is not that...but that... 這不是說……，而是說……
例1: It is not that the scales in the one case, and the balance in the other, differ in the principles of their construction or manner of working; but that the latter is much finer apparatus and of course much more accurate in its measurement than the former.
譯文：這并不是說在一種情況下所使用的磅秤和另一種情況下所用的天平在構(gòu)造原理上或工作方式上存在差別，而是說與前者相比，后者是一種更精密得多的裝置，因而在計量上必然更加準(zhǔn)確。
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