Australian English,a regional variety based on the Cockney English of the late 18th century,has developed its peculiar phonetic features over the years.

From the perspective of language relativity, this paper attempts to analyze the causes of regional varieties that are the colonial expansion of England and cultural differences.

The openness of English vocabulary can also be seen in its regional varieties There are different characteristics in Britain English, Canadian English and so on.

But during the course of its development, many regional varieties have come into being, which is inconvenient for the learners.

English,increasingly globalized,has engendered various new Englishes with distinctive local characteristics,namely regional varieties of English,along with its popularization worldwide,which has profound historical background.

The causes of the phenomenon may be the different visual angle of language,the diachronic changes and the regional varieties of English.

The results showed that the phase transition temperature of heating process was higher than that of cooling process at the same temperature change rate in the thermal expansion property curve, and austenite transformation region of continuously cast slab shifted to higher temperature zone about 6~16℃ at high heating rate, and to lower temperature zone about 10~20℃ at high cooling rate.

Mineralization roughly underwent volcanic sediment-regional metamorphism and deformation.

Gold mineralization is "volcanic sedimentation-regional metamorphism-ore hosting shear zone-reformation and superposition".

By means of numerical simulation, the impact of regional metamorphism on the cooling of the Fangshan intrusive body in Western Hill of Beijing is studied.