持续: to continue, to persist, to last, sustainable, preservation...
在: (located) at, (to be) in, to exist, in the middle of doing sth, (indicating an action in progress)...
时而: occasionally, from time to time...
重现: to reappear...
草地: lawn, meadow, sod, turf...
赛: to compete, competition, match, to surpass, better than, superior to, to excel...
序: order, sequence, preface...
千克: kilogram...
空闲: idle, free time, leisure, unused (place)...
生成: to generate, to produce, generated, produced...
