v(1)投，掷，抛(throw)[T+n，T+n+prep，T+n+adv]：～a net into the sea/a fishing line into the water/a letter into the fire/a stone against the window 把网撒入大海/钓鱼线抛入水中/信扔进火中/石头投向窗户;〖同〗throw，toss;

(2)脱落(get rid of;lose)[T+n，T+n+adv(off)]：The horse～a shoe.马掉了一个铁掌。Snakes～(off) their skins every year.蛇每年蜕皮。

(3)投向(turn or direct (sth) in a particular direction)[T+n，T+n+prep]：The lamp～long shadows across the garden/a warm glow on the table/a soft light on the walls.灯把长长的影子投向花园/温暖的红光投到桌子上/柔和的光投到四面墙上。The tree～a shadow on the grass.树在草地上投下影子。～sb a look of hatred仇恨地看某人一眼;～a glance (of surprise) at sb/one's eyes in sb's direction/an eye down the page(惊讶地)瞥某人一眼/把目光投向某人的方向/朝下看一眼书;(event)～a shadow on sb's life(事件)给某人的生活投下阴影;(fact)～a new light on the matter(事实)进一步说明了此事;～doubts on (upon) sb's actions/reliability怀疑某人的行为/可靠性;～one's mind back to one's childhood/several years/over the day回顾童年/多年前的往事/前一天的事;〖同〗shed，direct，scatter;

(4)浇铸((make a shape by pouring hot metal，clay，etc) into a mould)[T+n，I]：～bronze/iron/steel (into different shapes and sizes) 浇铸(不同形状和大小的)青铜/铁/钢件;Iron～s better than copper. 铁比铜好浇铸。Some metals ～easily.有的金属容易浇铸。

(5)铸造(make (an object of metal，clay，etc in this way))[T+n，T+n+prep(in)]：～a statue (a sculpture) in bronze/in a mixture of copper and tin用青铜/铜锡合金铸造一座雕像(雕塑);～a piston/a light concrete boat铸造一个活塞/一艘轻型水泥船;〖同〗mould，form，shape;

(6)选配演员(choose actors to perform in(a play，film，etc))[I，T+n]：(producer/director)～(parts) for a new film(制片人/导演)为一部新电影选演员;～a play/a movie/a film选配一出戏/一部片子/一部电影的演员;

(7)派(人演)角色(give sb a part in a play，film，etc)[T+n，T+n+prep(in/as)]：～sb as Hamlet/in the role of Hamlet/for the part of Hamlet让某人演哈姆雷特/演哈姆雷特的角色/演哈姆雷特的角色;～sb in the play 让某人在那出戏中演个角色;〖同〗assign，appoint，choose;

cast about/around for (v adv prep) 设法搜寻(vt，无 pass)：～about (around) for an experienced teacher/an excuse/an opportunity/an explanation设法找一有经验的教师/一借口/一机会/一解释;

cast aside (v adv) 抛弃 (vt)：～aside one's care/one's caution/one's inhibitions/one's wife/old habits/old friends/old clothes抛弃忧虑/谨小慎微/压抑感/妻子/旧习惯/老朋友/旧衣服;

cast away (v adv)(因船失事)遗弃(vt，通常 pass)：be～away on an island被遗弃在一个岛上;

cast down (v adv) 使沮丧(vt，通常 pass)：be (seem/feel)～down by the news/one's failure/one's dismissal(好像/觉得)被那消息/失败/解雇搞得垂头丧气;

cast off (v adv)遗(抛)弃(vt)：～off one's previous business connections/one's former associates/one's old friends抛弃从前的生意关系户/过去的伙伴/老朋友;

cast out (v adv) 赶走 (vt，通常 pass)：be～out of a temple/the best society被从寺庙/上层社会赶了出去;

n(1)投，掷，抛(act of throwing)[C]：lose all one's money on a single～of the dice一掷骰子输掉全部钱财;make a～with a fishing-line/a net 抛鱼线/撒渔网;The fisherman caught a big fish at the first～.渔夫头一网就捕到了一条大鱼。〖同〗throw，toss;

(2) 1)铸造件(object made by moulding)[C]：The doctor put a plaster～on her broken leg.大夫给她的断腿打上了石膏。2)铸模(special shape or mould into which hot metal is poured)[C]：The hot metal is poured into a～.熔化的金属灌进了铸模。

(3)类型，特性(general shape or quality)[U，a/the ～]：His face has a distinctly oriental～.他的脸是典型的东方人型的。be of (have) an inquiring/unusual～of mind有探究精神/心智非凡;be of(have)a strange～of mind心智奇特;the noble～of his head他那给人印象深刻的头颅;This puts a different～on the matter.这使事情显得不同了。〖同〗look，appearance;

(4)(全体)演员(complete set of actors in a play，movie，etc)[C，Gp]：There were only three people in the～.演员仅三个。The～of the play was given a standing ovation.人们起立给该剧的演员们鼓掌。Who was in the～? 演员中有谁?The whole～worked wonderfully together.全体演员配合得很好。a～list演员表;〖同〗actors，performers;

【辨异】 cast与throw和toss都表示把什么向空中投去。throw(投，掷，抛)是一般用语，常带状语表示方向和目的，如：throw a rope to sb(把绳子扔给某人);cast 是正式用语，现仅见于一些成语性用法中，如：cast a net(撒网);toss(投，掷，抛)是(手在下或侧面向上、下、前、后随便地)轻轻地扔，如：toss a bone to a dog(扔给狗一块骨头)。