The groundwater monitoring network design involves the determination of the sampling locations and sampling frequencies to characterize the contaminant plume in an aquifer over space and time.
地下水污染监测网的设计包括取样点在空间上的采样位置和时间上的取样频率这两方面的确定，其目的是为了准确刻画污染羽在含水层中随时间的变化状况。
Microwave Plasma Thruster (MPT) is a new type of electro-thermal thruster, which has widely applied prospect because of its high specific impulse, long lifetime, low plume contaminant and so on.
微波等离子推力器（MPT）是一种新型的电热型推力器，它具有比冲高、寿命长、羽流污染小等优点，具有广阔的应用前景。
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