Human bias is inevitable, but another source of bias in the representation of history has to do with the transitory nature of the materials themselves.
人类的偏见是在所难免的，但在历史的表现中，偏见的另一种来源与材料本身的短暂性有关。
2
Like paraelectric materials, this generates electricity from a heat source and produces cooling from an electrical source.
像辅助电材料一样，它从热源处发电，从电源处制冷。
3
The sourcematerials for the original course did not include lab exercises or assessments.