18.形成英语的基础　 for the basis for English

17.定居英格兰　 settle in England

16.受…影响　 be influenced by

15.伦敦与北方的温差

　 the difference in temperature between London and the north

14.全年，一年到头　 throughout the year

13.一般说来 in general

12.温和多雨　 mild with a lot of rain

11.被…包围　 be surrounded by

10.组成　 consist of

9.形成大不列颠本土　 form the mainland of Great Britain