He has evolved a new theory after many years of research.
他经过多年的研究, 逐渐总结出了新的理论.
他经过多年的研究，逐渐总结出了新的理论。
The American constitution was planned; the British constitution evolved.
美国宪法是精心制定的, 英国宪法是约定俗成的.
Many Victorians were shocked by the notion that Man had evolved from lower forms of life.
在维多利亚时代, 许多人对於人是由低级生物进化而来的见解大为震惊.
