目的：观察萘普生栓在绝经后妇女取环中的作用。
AIM: To observe the application effect of naproxen on postmenopausal women with intrauterine device.
为了表示电流总的作用，通常取正载荷子的流动方向为电流方向。
Conventionally, the direction of electric current is that of the flow of the positive ions.
为了表示电流总的作用，通常取正载荷子的流动方向为电流方向。
Conventionally, the direction of electric current is that of the flow of the positive ions.
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