第五,主语从句。 Eg: What has caught our attention is /It is noticeable that the environment in both the rural and urban areas is deteriorating." A' w- N2 Y- p
值得注意的是农村和城市的生态环境都在不断恶化。) E- W2 M" H% c$ g, c+ S- l
Eg: It is universally acknowledged that environmental pollution becomes one of the most serious problems in China or even the world as a whole.5 z% u. a1 Y$ c; f+ m
众所周知,环境污染问题是中国乃至世界面临的最为严重的问题之一。