自我學(xué)習(xí)Self-study 2a--劍橋商務(wù)英語(yǔ)高級(jí)詞匯

Slef-study 2a

fluctuate: v.to change frequently in size, amount, quality, etc., especially from one extreme to another;

collapse: v. 1、to decrease suddenly in amount or value;2、to fail suddenly or completely;

upward:adj. 1、pointing towards or facing a higher place;an upward gaze;2、increasing in amount or price;