1·Our principal problem is lack of time.
我们的主要问题就是缺少时间。
2·Resolving equation group is a principal problem in engineering study.
解方程组是工程研究中的基本问题。
3·The principal problem is how to determine the distribution of the slices.
确定条块的分布是它的基本问题。
4·The effect of constituent variations is the principal problem for nuclear analysis.
成分的影响是核分析的主要问题。
5·'Milan has no immediate need to buy new players and that's not the principal problem.
米兰现阶段没有买新球员的必要，这不是主要问题。
6·The principal problem is that quality needs are transferred correctly, i. e. quality conversion equally in design for quality.
围绕着产品质量展开的保质设计，首先要解决质量需求在各阶段的无误传递，即质量等价转换问题。
7·In the 1980s and even at the close of the war, the principal problem was to achieve and maintain high levels of output and employment.
在20世纪80年代甚至是在二次大战结束时，经济的基本问题是达到并保持高水平的产出和高就业率。
8·It also reckons that because the principal problem facing today's highly indebted countries is not high interest payments but high primary budget deficits.
IMF同时估计，由于面对目前高额负债的国家，主要的问题不是要支付的高额利息，而是高额的初级预算赤字。
9·The concept of "equivalence" in translation has not only been a principal problem among Western translation theories for 2000 years, but also a basic one in modern time.
翻译中的“对等”概念，不仅是二千年来西方翻译理论的一个根本问题，同时，也是现代翻译的根本问题。
10·The third part concerned mainly about the principal problem and the corresponding causes existing in the university personnel file management under the system of Appointment.
第三部分是聘用制下高校人事档案管理存在的突出问题及成因。