diff --git a/sdk/components/pipette_module/pipette_ctrl_module_utils.cpp b/sdk/components/pipette_module/pipette_ctrl_module_utils.cpp
index 436396f..4678166 100644
--- a/sdk/components/pipette_module/pipette_ctrl_module_utils.cpp
+++ b/sdk/components/pipette_module/pipette_ctrl_module_utils.cpp
@@ -218,6 +218,7 @@ int32_t PipetteModule::calibrate_liquid_volume(liquid_info_t *liquidinfo, int32_
   ZLOGI(TAG, "calibrate_liquid_volume: volumeX100nl:%d", volumex100nl);
   ZLOGI(TAG, "k: %d, b: %d", liquidinfo->volume_calibration_coefficient_k, liquidinfo->volume_calibration_coefficient_b);
 
+  // 这里之所以*10, 是因为liquidinfo->volume_calibration_coefficient_b 对应的单位是0.001ul
   int32_t x100nl = volumex100nl * liquidinfo->volume_calibration_coefficient_k * 0.001 +  //
                    liquidinfo->volume_calibration_coefficient_b * 0.001 * 10;
   ZLOGI(TAG, "calibrate_liquid_volume: after_x100nl:%d", x100nl);