extensive
/ɪkˈstensɪv; ɪk`stɛnsɪv/ adj
1 large in area; extending far 广大的; 广阔的
an extensive view 广阔的视野
extensive farming 粗放的耕作
the extensive grounds of a country house 农舍的宽敞庭院.
2 large in amount; wide-ranging 大量的; 广泛的
extensive alterations to a building 对一建筑物大规模的改建
Her knowledge of the subject is extensive. 她这方面的学识很渊博.