请改写以下文字：图中300 cm-1 以左的峰为径向呼吸峰其与SWCNT薄膜的直径分布以及金属型与半导体型的比例有关。
The peak to the left of 300 cm-1 in the graph is the radial breathing mode peak, which is related to the diameter distribution of SWCNT film and the ratio of metallic and semiconducting types.
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