autumn不是美式英语,fall是美式英语;autumn是比较正式的书面用语,是英式英语表达。
“秋季 秋天”名词是它的唯一属性;例句:1、Winter comes after autumn.秋去冬来。
2、The fall of one leaf is enough to tell coming of autumn.一叶知秋。
3、Nature is most colourful in autumn.秋天, 大自然的色彩最为丰富。
4、What I like best is the autumn in Beijing.我最喜欢的是北京的秋天。