2017托福词汇：扔
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词根cast释义： 英 [kɑ:st]美 [kæst] vt.铸造;投射;投掷;脱落，脱皮;n.铸型;演员表;轻微的斜视;投，掷骰;vi.掷，投;计算，加
【来源及含义】Latin: pure, cut off, to cut off from, separated
【相关描述】A reference to "a race of men" is from Latin casto, "chaste" from castus, "pure, cut off, separated"; past participle of carere, "to be cut off from" (and related to castrate and -cest-).
【同源单词】caste, castigate, castigation, castigatory, chaste, chastely
【参考范例】cast a stone 扔石头
He cast a furtive glance at her. 他偷偷瞥了她一眼.
His muddled evidence casts doubt on his reliability as a witness. 他的证词糊里糊涂, 使人对他作为见证人的可靠性产生了怀疑.
cast bronze 浇铸青铜.
We're casting (the play) next week. 我们下星期挑选(话剧)演员.
cast词根词缀记忆及用法：
1. broadcast vt.广播;撒播;散布 n.广播;播种 adj.广播的;普遍的
broadcast the news, a concert, a football match播送新闻﹑音乐演奏﹑足球比赛.
broadcast one's views 表明自己的观点.
newscaster n. 新闻播报员
2. forecast v.,n.预测;预报
前缀fore- 表示"前面, 预先，词根来源于古英语副词fore。
forecast a fall in unemployment 预测失业人数下降
forecast that it will rain tomorrow 预报明天有雨
forecast what the outcome of the election will be 预测选举结果.
3. outcast n.被逐出者;流浪者 adj.被弃的;无家可归的
be treated asan outcast 遭到被人赶出似的对待.
4. overcast adj.多云的;阴暗的;忧郁的 v.使阴暗n. 被驱逐的人,流浪者; 被遗弃的狗 (猫等)
前缀over-表示过度、太甚;在上、在外、从上、越过;颠倒、反转。
a dark, overcast day 阴暗的一天
It's a bit overcast it might rain. 天有点阴--可能有雨.
a gloomy, overcast expression on his face 他愁眉苦脸.
5. telecast v.以电视播送 n.电视播送
前缀tele = fur 表示“远”, 引申为“电”, 电从远方(tele现多用以表示与电波有关的事物)
The game will be telecast live.比赛将现场直播。
6、downcast adj. (指眼睛)目光向下的;(指人﹑表情等)沮丧的,悲哀的
前缀down-下，cast扔，“下扔”，即目光向下，表情向下，即沮丧的、悲哀的
He seemed very downcast at the news. 那消息似乎使他非常难过.
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