臭氧
A blue gaseous allotrope of oxygen, O3, formed naturally from diatomic oxygen by electric discharge or exposure to ultraviolet radiation. It is an unstable, powerfully bleaching, poisonous oxidizing agent with a pungent, irritating odor, used to deodorize air, purify water, treat industrial wastes and as a bleach.
臭氧一種氣態(tài)氧氣的同素異形體，O3在紫外線(xiàn)輻射下通過(guò)電子放射或暴曬從雙原子氧氣自然形成。它是一種不穩(wěn)定的具有強(qiáng)漂白性的，有毒的氧化劑，有臭的刺激性的氣味，用來(lái)除去空氣的異味，凈化水，處理工業(yè)廢物和作為漂白劑
Co-movement
A key feature of the Burns and Mitchell economic was to focus on the amount of cyclical co-movement or coherence among a large number of economic variables. This co-movement is the prime characteristic of their definition of the business cycle: "...a cycle consists of expansions occurring at about the same time in many economic activities, followed by similarly general recessions, contractions, and revivals which merge into the expansion phase of the next cycle;...in duration business cycles vary from more than one year to ten or twelve years..."
A blue gaseous allotrope of oxygen, O3, formed naturally from diatomic oxygen by electric discharge or exposure to ultraviolet radiation. It is an unstable, powerfully bleaching, poisonous oxidizing agent with a pungent, irritating odor, used to deodorize air, purify water, treat industrial wastes and as a bleach.
臭氧一種氣態(tài)氧氣的同素異形體，O3在紫外線(xiàn)輻射下通過(guò)電子放射或暴曬從雙原子氧氣自然形成。它是一種不穩(wěn)定的具有強(qiáng)漂白性的，有毒的氧化劑，有臭的刺激性的氣味，用來(lái)除去空氣的異味，凈化水，處理工業(yè)廢物和作為漂白劑
Co-movement
A key feature of the Burns and Mitchell economic was to focus on the amount of cyclical co-movement or coherence among a large number of economic variables. This co-movement is the prime characteristic of their definition of the business cycle: "...a cycle consists of expansions occurring at about the same time in many economic activities, followed by similarly general recessions, contractions, and revivals which merge into the expansion phase of the next cycle;...in duration business cycles vary from more than one year to ten or twelve years..."