the amount of acid in a substance or in your stomach
发音
例句
1. This plant prefers alkaline soil, though it will readily tolerate some acidity. 这种植物在酸性土壤中也能生存,但硷性土壤更加适宜。 2. Gastric acidity would not prevent the organism from passing into the gut. 胃的酸度不能防止细菌进入肠道。