德育，作为一门学科的性质和内容常常缺少稳定性，在更多时间里，它是在执行任务或解决问题而不是专业研究。
As the nature and content of discipline, moral education, is always short of stability. More often, it is carrying out a mission or solving a problem but not doing professional research.
再则缺少提供稳定性的垂直表面是所有全翼设计的致命弱点，过去是，现在也是；——这导致经常侧翻，使快速射击和准确轰炸都变得更为困难。
For another, the lack of stabilizing vertical surfaces-a bane of all-wing designs, past and present-resulted in frequent lurches, making sharp shooting and accurate bomb delivery that much harder.
渗流场分析是坡稳定性计算中不可缺少的部分。
Analysis for vadose field was a indispensable part in the slope stability calculation.
伯蒂奇：你打出了漂亮的充满力量的比赛，红土的问题是缺少一些稳定性。
Tomas Berdych: Nice, powerful game, but he lacks the mobility to be a serious force on clay.
稳定性的缺少给此方法的定量收敛分析带来了实质困难。
The shortage of B-stability brings some substantive difficulties to their quantitative convergence analysis.
但在实际的工程中，特别是对于糯扎渡这种边墙高、跨度大、洞室相互交错的地下洞室群的围岩稳定性问题，还缺少系统的评价方法。
However, evaluation methods of wall rock stability in underground cavern groups with high side-wall, large span and intersect caverns are required for actual projects such as Nuo Zhadu.
但在实际的工程中，特别是对于糯扎渡这种边墙高、跨度大、洞室相互交错的地下洞室群的围岩稳定性问题，还缺少系统的评价方法。
However, evaluation methods of wall rock stability in underground cavern groups with high side-wall, large span and intersect caverns are required for actual projects such as Nuo Zhadu.
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