So it's a simple and convenient method.
因此，它是一种简便方法。
It has provided a simple and convenient method for establishing a mathematic model of a dynamic system.
它为建立动力学系统的数学模型提供了方便而简明的方法。
Plastic bag cultivation was a simple and convenient method for screening Al tolerant soybean varieties.
塑料袋栽试验可以作为筛选大豆耐铝性品种的简便方法。
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