同位语从句。 5 c. S$ v% U5 z/ G- n" t% i9 F 0 A2 y* v' T$ u: y2 Q- W5 V U2 V. a Eg: It is an undeniable fact that environmental pollution becomes increasingly serious. ' B1 [' w |6 ~3 h5 a9 r7 s, `转自:考试网 - [Examw.Com]: K* v7 g$ H' b5 r3 f0 c
环境污染变得越来越严重是不可否认的事实。 4 g' V( o' X" [" X Eg: No one can deny the basic fact that it is impossible for average workers to master those high-technology skills easily. , @* d6 ^% n6 i% d# X( l' x
8 S5 o) n5 i% a, [/ s2 E9 X 没有人能否认这一基本事实:对于一般工人来讲,轻松掌握这些技术是不可能的。