Steam vegetables for 30 to 60 seconds, then remove them from the heat and drop them in cold water.
将蔬菜蒸30到60分钟后取出，倒入冷水里面。
2
The steam pressure or water pressure drop.
蒸汽压力或给水压力下降。
3
The difference in temperature of time of good weather, daytime and evening will become big, meeting the steam of cold air, change into small drop of water.