Thread electric charges and surface electric charges are two important physics models.
线电荷及面电荷是两个重要的物理模型。
Two kinds of mathematical models of runway surface are given.
给出了跑道表面的两种计算模型。
Rabbit infected surface wound models were prepared.
本文以家兔制作感染创面动物模型。
Rabbit infected surface wound models were prepared.
本文以家兔制作感染创面动物模型。
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