词汇	I am sick
释义	I am sick. 我病了。
随便看	cost of production system cost of production theory cost of production theory of value cost-of-production theory of value Cost-of-production theory of value Cost of production was corresponded to reduce cost of products cost of progress Cost of project cost of project implementation cost of prospecting well cost of protection cost of publish articles cost of purchase cost of pur-chase cost of purchasing cost of quality cost of railway transportation cost of raising funds cost of raw and processed materials cost of raw materials cost of raw materials used cost of real estate cost of reconstruction works cost of recovery