[mass noun]the action of becoming larger or more extensive 扩大;扩充;扩展 the rapid expansion of suburban London. 伦敦郊区的迅速扩展。 [count noun]a small expansion of industry. 工业的小幅发展。 ■extension of a state's territory by encroaching on that of other nations, pursued as a political strategy (领土)扩张 German expansion in the 1930s. 20世纪30年代德国的扩张。 ■[count noun]a thing formed by the enlargement, broadening, or development of something 扩展部分;扩大物;扩充物 the book is an expansion of a lecture given last year. 这本书是在去年的一个讲座基础上扩写而成的。 ■the increase in the volume of fuel on combustion in the cylinder of an engine, or the piston stroke in which this occurs (汽缸或活塞冲程内的)燃料增加
语源
early 17th cent.: from late Latin expansio(n-), from Latin expandere (see expand)