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1.The preliminary center-of-gravity analysis helps us understand the overall structure of the system.
初步的重心分析有助于我们理解系统的全局结构。
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2. During the design phase, we need to consider the preliminary center-of-gravity of the project.
在设计阶段，我们需要考虑项目的初步重心。
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3.The engineers used a preliminary center-of-gravity calculation to determine the optimal location for the new plant.
工程师们使用了一个初步的重心计算来确定新工厂的最佳位置。