The content of essential oil of underground part was significantly higher than that of the aerial part and extraction rate of ultrasonic-assisted extraction method was higher.
地下部分挥发油含量明显高于地上部分，且超声辅助浸提法提取率更高。
The content of essential oil of underground part was significantly higher than that of the aerial part and extraction rate of ultrasonic-assisted extraction method was higher.
地下部分挥发油含量明显高于地上部分，且超声辅助浸提法提取率更高。
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