放声的英文：
playback
sound reproduction

参考例句：

Sharon laughed outright.
莎伦放声大笑。

Bellow out a laugh
放声大笑，哈哈大笑

Roar with laughter,pain,rage,etc
放声大笑、痛得大叫、怒吼

A loud,coarse laugh;a guffaw.
放声大笑;痴笑

She laughed a hearty laugh.
她放声大笑。

The students broke out in a riot of laughter.
学生们突然放声大笑。

They howled with laughter at the scene.
他们看见那光景，放声大笑。

She burst out crying at the sad news.
听到那不幸的消息，她放声痛哭。

This time she burst into hoots of laughter.
这次她突然放声大笑起来。

I screamed with laughter at the joke.
听到这个笑话,我放声大笑。

playback是什么意思：
n. 录音再生,录音再生装置;

It will playback on stereo.
它是立体声放音。

A relatively narrow magnetic tape used to record sound for subsequent playback
录音磁带一种相对狭长的磁带，用于录下声音以便日后重放

On dictation equipment, a device for accurate alignment of playback head, or combined head, to the track on the recording medium.
录音设备上的一种装置,它能精确地把重放磁头或组合磁头调准到记录介质的磁道上。

sound是什么意思：
n. 声音；印象，感觉；录音；音乐风格；海峡，海湾
v. 发出声音；探测，试探；听起来；发出警报
adj. 健全的，完好的；明智的；酣畅的
adv. 酣（睡）

Sounding by sound is a sound method of sounding sounds.
声音测量是一种用声学探测声音的方法。

sounding survey
海底测深；水深测量

The advance was sounded.
进军号吹响了。

reproduction是什么意思：
n. 生殖，繁殖；复制，再版；复制品

Flowers are reproduction parts of a plant.
花是植物的生殖器官。

The printed or positive reproduction of a microphotograph.
缩微印刷品一张微型照片的印刷或正片复制品

Reproductive organs,systems,urges
生殖器官、系统、欲望.