缺乏材料 meaning in Chinese

lack of materials

We were held up for lack of materials
由于缺乏材料，我们进行不下去了。
? by using of ls - dyna program , the dynamic deformation processes of modeled the two kinds of experiments without he reaction are calculated and show little difference from the experimental data when plastic _ kinematic model was used for lacking materials properties of other models
由于缺乏材料参数，对炸药选取弹塑性本构模型，因此可能导致计算结果较真实情况有一定偏差。另外，利用现有的点火增长反应速率模型对两种试验进行了初步的计算。