three dimension mathematic model的用法和樣例：
例句
- The bed evolution of Oi River in Central Japan is studied with a 1-D numerical model of sediment transport.
摘要利用一維的泥沙數值模型研究了位於日本中部的大井河河床變動情況。 - The main job was to establish the model of full aircraft and landing gears and run a symmetric landing and taxiing simulation.
摘要主要建立了全機和支柱式起落架緩衝支柱的數值模型，並進行了著陸和滑跑模擬計算。
