1.broadcast的本意是“广泛地播撒”,现代英语中主要作广播电台或电视台用无线电或电视“广播”“播放”解,指其发送给多个接收者。引申可指“传播”,尤指乱传播消息。
2.broadcast可用作不及物动词或及物动词; 用作及物动词时,跟名词或代词(如演唱、音乐、讲话等)作宾语,可用于被动结构。
3.broadcast与live连用,表示“现场直播”。

broadcast to(v.+prep.)
(向…)传播,乱传 send out to sb; make widely known
▲broadcast sth to sb/sth
He broadcast the news to all his friends.他向他的朋友们乱传消息。
He broadcast the secret to the whole school.他将这个秘密传遍了全校。

用作不及物动词
▲S+～(+A)
Some stations broadcast 24 hours of the day.有些电台一天24小时广播。
The station broadcasts round the clock in four languages.这家电台一天24小时用四种语言广播。
The BBC broadcasts to all parts of the world every day.英国广播公司每天对世界的所有地区广播。
The Prime Minister will broadcast this evening.首相将于今晚发表广播演说。
用作及物动词
▲S+～+n./pron.
The radio announcer is broadcasting a digest of the week's news.广播员正在播报一周新闻摘要。
The radio broadcast the news in detail.无线电台详细地广播了那则消息。
The BBC will broadcast the news at 10 o'clock. 英国广播公司将在10点钟广播这条消息。
They broadcast his speech.他们广播了他的讲话。
They broadcast a children's play.他们广播儿童剧。
The president will broadcast his message on all stations tonight.总统今晚将向全国广播咨文。
Don't broadcast gossip.不要乱传流言。
She likes to broadcast gossip. 她喜欢传播东家长西家短。
Early in April, just before a rain begins, broadcast tomato seeds.4月初头场雨前,要把西红柿种子播下。
◇ 用于be ～ed结构
The Presidential address will be broadcast at 9 o'clock.总统的讲话将在9点钟广播。
A special message was broadcast last night.昨晚广播了一条特别消息。
The World Cup Match is broadcast in Europe,Asia and the Americas.世界杯比赛在欧、亚和南、北美洲都进行了转播。
The best performances were tape-recorded and broadcast over the radio.最好的节目被制成磁带并且通过收音机对外广播。
The news being broadcast was that the president had been kidnapped.正在播放的是总统遭绑架的消息。

broadcast, telecast
这两个词都可作“播送”解,其区别是:broadcast指通过广播电台或电视台播送或播放新闻、节目等内容,也可指有线广播(与the连用),与radio broadcast相似; 而telecast专指用电视播送。
broadcast, scatter, sow, strew
这组词的共同意思是“撒”,其区别是:strew指隔一段时间〔距离〕撒一次; scatter强调碎片随意散落,例如:
Flowers scattered the path.花散落在小路上。
sow专指播种,引申指传播思想、理论,例如:
These seeds should be sown in April.这些种子应在4月播种。
broadcast强调广为撒播,向四面八方扩散,专指“撒播种子”时,可与scatter 换用。

1.broadcast作名词是“广播节目”的意思,指通过无线电或电视来传送的消息或节目。
2.broadcast泛指“电波传送”时,常作介词宾语。

They learned it from a radio broadcast.他们是从收音机里听到它的。
Do you listen to the broadcast?你听广播吗?
I heard his broadcast last night.昨夜我听到了他的播音。
We usually listen to the broadcast in the morning.我们通常在早晨听收音机的广播。
Did you listen to the broadcast of the football match?你听了足球比赛的广播吗?
I listen to the sports news broadcast on the radio station every day.我每天从无线电台收听体育新闻广播。
She listens to the English broadcast at 10:00 every night.每晚10:00她收听英语广播。
The radio station faded the music up again after the special news broadcast.电台在专题新闻广播之后重新逐渐增强了乐曲的音量。
He will appear on tomorrow's broadcast.他将在明天发表广播讲话。
These broadcasts will be heard in most parts of the world. 这些广播节目世界大部分地区都能听到。
The President's broadcast was televised from Washington D.C.总统从华盛顿发表广播电视讲话。
The important news has been sent broadcast to inform the entire nation.这条重要消息已经广播通报全国。

［同义词］ v. announce, declare, distribute, relay, send, spread, strew, transmit n. program, show