图5（a-d）中包含四条曲线，其中的饱水曲线（黑线）和干燥曲线（红线）

Figure 5 (ad) contains four curves, of which the saturated curve (black line) and the dry curve (red line) have been discussed in detail in section 3.1, and they are only used here for comparison. So focus on the water absorption curve (blue) and alcohol absorption curve (purple) after drying.

Figure 5 (a-d) contains four curves, of which the water-fed curve (black line) and drying curve (red line) are described in detail in section 3.1, which is used only for comparison. So focus on the absorbent curve (blue) and alcohol absorption curve (purple) after drying.

Figure 5 (A-D) contains four curves, of which the saturation curve (black line) and drying curve (red line) have been discussed in detail in Section 3.1, and are only used for comparison. So we focus on the water absorption curve (blue) and alcohol absorption curve (purple) after drying.<br>