审稿人要求图片修改一下，但是不知道怎么改，求好心人帮忙看一下。
1. The lines in figures 1 to 5, should be smooth one instead of point to point joining.
请问怎么‘should be smooth ’？
2. For enhancing the confidence of the reader about the reproducibility of the data, error bars should be shown for Figures 1-5.
请问‘error bars ’怎么做？
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