She cooks with a hot plate because gas is too expensive.

她用一个盘子烹煮，因为燃气太贵。

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An orifice plate is often used to restrict and measure gas flow.

通常情况下采用孔板节流、测量气体流量。

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An orifice plate is often used to restrict and measure gas flow.

通常情况下采用孔板节流、测量气体流量。

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