low red heat

基本解释

High-temperature heat, the color will be bright red blood, blood viscosity will be low.
熱溫度高，血液的顔色就會鮮紅，血液的粘稠度就會低。
zyynb.com
He first braised the pork, added Chinese fermented wine and made red-braised pork, then slowly stewed it on a low heat.
他首先燉爛豬肉，然後加入發酵的米酒制成紅燒肉，進而文化慢燉，這就是“東坡肉”的最初形態。
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.
把櫻桃水，25尅砂糖和紅果膠放到一個小鍋裡低火煮至濃稠，加入無核櫻桃拌勻，關火晾涼。
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