low red heat

基本解释

High-temperature heat, the color will be bright red blood, blood viscosity will be low.
热温度高，血液的颜色就会鲜红，血液的粘稠度就会低。
zyynb.com
He first braised the pork, added Chinese fermented wine and made red-braised pork, then slowly stewed it on a low heat.
他首先炖烂猪肉，然后加入发酵的米酒制成红烧肉，进而文化慢炖，这就是“东坡肉”的最初形态。
Mix cherry juice, 25 grams of sugar and cake red glaze in a small pot. Cook over the low heat and add in the pitted cherries. Switch the heat off and allow the cherry filling to cool.
把樱桃水，25克砂糖和红果胶放到一个小锅里低火煮至浓稠，加入无核樱桃拌匀，关火晾凉。
blog.sina.com.cn

Much of Southern California was under red flag warnings for fire danger due to heat, wind and low humidity levels.
NPR: Wind-Fueled Wildfire Erupts East Of Los Angeles