The flower-visiting hoverfly abundance at the low site is higher than that of the high site, while the species richness is lower than that at the high site.
低海拔样地访花食蚜蝇的多度高于高海拔样地，而物种丰富度低于高海拔样地；
The flower-visiting hoverfly abundance at the low site is higher than that of the high site, while the species richness is lower than that at the high site.
低海拔样地访花食蚜蝇的多度高于高海拔样地，而物种丰富度低于高海拔样地；
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