of置于句首的语法结构剖析

Of the many challenges the Chinese government faces, one of the mostserious is the loss of arable land.

One of the most serious of the many challenges the Chinese government faces is the loss of arable land.

你把黑体部分提前，便得到：

Of the many challenges the Chinese government faces, one of the most serious is the loss of arable land.

这个最高级常见的格式，把范围定语提到句首，予以强调，同时照顾了句子结构的匀称。