sad
美[sæd] 网络悲伤；伤心；难过的；中情局特别活动科
1 . This condition is called seasonal affective disorder, or SAD for short.
这种病情叫做季节性情感失调症，或简称SAD。
来自柯林斯例句
2 . Guy Powell, defending, told magistrates: "It's a sad and disturbing case."
盖伊·鲍威尔在进行辩护时对地方法官说道：“这是一件非常不幸、令人不安的案子。”
来自柯林斯例句
3 . I'm sad about my toys getting burned in the fire.
我的玩具在这场火中付之一炬，这令我很难过。
来自柯林斯例句
4 . He died five or six years ago I'm sad to say.
很遗憾，他在五六年前去世了。
来自柯林斯例句
5 . How can anyone look sad at an occasion like this?
在这样的场合怎么会有人显得忧伤呢？
来自柯林斯例句
1.experiencing or showing sorrow or unhappiness;
feeling sad because his dog had died
2.of things that make you feel sad;
sad news
3.bad; unfortunate;
my finances were in a deplorable state
2005年，de la Monte课题组首次阐明了SAD作为3型糖尿病的新观点。3型糖尿病的主要特点是：脑内胰岛素受体的敏感性降低，即出现胰岛素抵抗，但却伴有脑内胰岛素水平下降，对维持神经元存活起着重要作用的胰岛素样生长因子（IGF-1）及其受体水平也降低。这类病人可同时存在糖尿病或外周糖代谢异常。 SAD （Seasonal Affective Disorder）季节性情感障碍