The 1920s and 1930s saw repeated unsuccessful attempts at primary-product cartels . 二十世纪二十年代和三十年代，人们又一再试图组织初级产品的卡特尔，但都没有成功。
Across the 1930s world price ratios turned severely against most primary-product-exporting countries . 在整个三十年代世界价格比率变得大大不利于大多数初级产品出口国。
When the secondary circuit is closed, both primary and secondary currents set up a flux in the core . 当次级电路接通时，初级电流和次级电流都在铁芯内建立了一个磁通量。
Therefore, the magnetomotive force in the air gap is essentially proportional to the primary ampereturns squared . 所以，气隙中的磁动势实际上与初级安匝数的平方成正比。
A primary culture of myoblasts may be prepared by excising skeletal muscle tissue from 10 to 30 day old rat embryos . 制备成肌细胞的初级培养物，可以将10-30天的大鼠胚胎骨骼肌组织剪切下来。
Again, the policy implication is that government should discourage investments in primary production and should favor industry . 此外，这项政策的含意是政府应阻止初级产品生产的投资而应支持工业投资。
The simplistic view of commercialized media continues in only slightly more sophisticated form from its origins early in this century . 商业化的传播媒介的这种过分简单化的观点从本世纪初的初级形式发展到了更为精致的形式。
Without such proficiency in basic and inter mediate english , it is impossible to function effectively in an english business environment . 如果对初级、中级英文没有这样的熟练，在英文的商业环境中是不可能发挥出有效的功能的。
The new protection has also extended to primary products with the united states raising its sugar tariff and tightening its beef import quotas . 由于美国提高食糖的关税率并缩减牛肉的进口配额，新的贸易保护政策也就扩大到初级产品上来了。
These examples are arbitrarily selected from a wide range of studies that have been carried out by clinicians either in the primary medical-care or in the hospital field . 这些例子不过是从临床医生们在初级保健工作或是医院工作岗位上开展的大量研究中随便挑出来的。
