
unsaturated
词源
源自拉丁语 'un-' (不) + 'saturatus' (饱和的),字面意思是'未饱和的'。19世纪中期开始用于化学领域。
adjective
❶ 指化学物质中碳原子间存在双键或三键,能够与其他原子结合的状态,常用于描述脂肪或油类。
“Olive oil contains unsaturated fats which are healthier for the heart.”
(橄榄油含有不饱和脂肪,对心脏更健康。)
“Unsaturated hydrocarbons are more reactive than saturated ones.”
(不饱和碳氢化合物比饱和的更具反应性。)
❶ 指溶液未达到最大溶解量,仍能继续溶解更多溶质的状态。
“The unsaturated solution could still dissolve more sugar.”
(这种未饱和溶液还能溶解更多糖。)
“When a solution is unsaturated, no precipitate forms.”
(当溶液未饱和时,不会形成沉淀物。)
常见短语
unsaturated fat — 指含有双键的脂肪分子,通常来自植物,常温下呈液态,被认为比饱和脂肪更健康。
“Doctors recommend replacing saturated fats with unsaturated fats in your diet.”
(医生建议在饮食中用不饱和脂肪替代饱和脂肪。)
unsaturated solution — 指还能溶解更多溶质的溶液状态,与饱和溶液相对。
“The unsaturated solution became saturated after adding more solute.”
(加入更多溶质后,未饱和溶液变成了饱和溶液。)