A device for drop-freezing experiment was improved, which consists of the cold-cavity, thermometer, controller of temperature, recorder of signals, coldsink, and environment box.
Multiple-effect evaporation can be classified as a variable hot and coldsink system. The minimum utility of this kind of system must bet he case where multiple pinch points occur.
多效蒸发系统属于可变冷、热源系统，此类系统在出现多狭点时达到最小外界供热和取热。
3
She put the plug in the sink and filled it with cold water.