in 1933 the rubber, clothing, and shipbuilding industries put into effect a six-hour workday, not as a temporary expedient but as a seemingly permanent accommodation to what many observers thought was an economy made overproductive by advances in technology.
what many observers thought was ...是同位结构,请问什么意思? 感觉what前面那个to,后面应该跟一个名词性从句,后面was什么什么的感觉好奇怪