By using hydrodynamics theory and method, we can analyze the mechanics principle of two-tank system and establish the system mathematics model.
本文从机理建模入手，应用流体力学理论对双容水箱液位系统进行力学分析，建立非线性数学模型。
By using hydrodynamics theory, the mechanics principle of two-tank system was analyzed and the system nonlinear mathematics model was established.
应用流体力学理论对双容水箱液位系统进行力学分析，采用机理建模方法，建立非线性数学模型。
Dive shops, including Baja Expeditions, offer two-tank dive packages starting at $50 per person, Chandler says. "Snorkeling with sea lions is an option for non-divers," she adds.
钱德勒说：“潜水店，包括加利福尼亚探险，提供以每人五十美元的二个潜水所需包装，”她还补充道：对于不潜水的人来说和海狮一起浮潜也是一种不错的选择。
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