英 [ˈdaʊnkɑːst] 美 [ˈdaʊnkæst]
adj. 沮丧的；低垂的；气馁的
n. 倒台；俯视的目光；向下转换
downcast /ˈdaʊnˌkɑːst/ TEM4
形容词 If you are downcast, you are feeling sad and without hope. 情绪低落的
Barbara looked increasingly downcast as defeat loomed.
失败越临近，芭芭拉的情绪看上去越为低落。
形容词 If your eyes are downcast, you are looking toward the ground, usually because you are feeling sad or embarrassed. (因伤心或尴尬而)向下看的
She was silent, her eyes downcast.
她不做声，目光低垂。
a ventilation shaft through which air enters a mine
directed downward
a downcast glance
low in spirits
downcast after his defeat
同义词： blue / depressed / dispirited / down(p) / downhearted / down in the mouth / low / low-spirited
向下转换
Observer在Update()方法中，对传递进来的引用进行一个向下转换(Downcast)，转换成具体的Subject类(比如热水器)，然后通过这个引用调用Subject实体类(热水器)的公共属性获取状态信息(从中把有用数据拉出来...
... overcast阴暗的： downcast：沮丧的 outcast：流浪的人 ...
... [fall] 从天而降;落下 [downcast] 低落 [parachute] 一种折叠伞形的装备,用轻质纤维制造,使携带此伞的物体对空气产生阻力而速度减慢,专门用于从飞机上跳出安全降落,空投装备、物质或使飞机着陆后得到减速 ...
... Slump 消沉，低落 Downcast 气馁的，悲哀的，沮丧的 Subdued 屈服的，减弱的 ...
downer 镇定剂；令人沮丧的人
沮丧的；低垂的；气馁的
She was silent, her eyes downcast.
她不做声，目光低垂。
She was so downcast, so afraid that it should die!
她是那么沮丧，那么害怕它会死去！
The people observe thy downcast head, thy clouded mien, and they take it for an omen.
人们看到你低垂的头，你闷闷不乐的样子，就以为是不好的预兆。
Despite losing their eighth successive Test match in Australia, West Indies were not too downcast.
BBC: Australia kept a tight hold on the Sir Frank Worrell trophy
Coal exporters are downcast, as they also face low global prices for the black stuff.
ECONOMIST: From a royalties bill, the strong rand and lawsuits
The whole thing left me downcast about who Americans choose as heroes these days.
FORBES: Thinking Outside the Brackets: New Priorities Key to Securing America's Sci-Tech Future