A defibrillator is a machine that sends a strong electric shock through the chest to stop the heart’s wild, shaking beat and let a proper beat return.

A defibrillatordefibrillator is a machine是一種機器 that sends a strong electric shock through the chest會透過胸口送出一股強烈的電擊 to stop the heart's wild, shaking beat and let a proper beat return讓心臟停止那種紊亂顫動的跳法，好讓正常的心跳回來。

Doctors and ambulance workers use a large one in hospital. In stations, schools, and shops you may see a smaller box called an AED — a voice tells you where to put the pads.

Doctors and ambulance workers醫生和救護人員 use a large one in hospital會在醫院裡使用大型的。In stations, schools, and shops在車站、學校、商店裡, you may see a smaller box called an AED你可能會看到一個比較小、叫做 AED 的盒子 — a voice tells you where to put the pads它會用語音告訴你電擊貼片該放在哪裡。

The shock is not a movie “restart” for every stopped heart. It is for a heart that is still electrically busy but in a dangerous mess (people call that fibrillation). If the heart has gone completely quiet, this machine often cannot help.

The shock這個電擊 is not a movie "restart" for every stopped heart不是電影裡那種讓每顆停止的心臟「重新啟動」的招數。It它 is for a heart that is still electrically busy but in a dangerous mess是用在心臟的電活動還在運作、但亂成一團很危險的情況 (people call that fibrillation)（人們稱之為 fibrillation，心室顫動）。If the heart has gone completely quiet如果心臟已經完全靜止, this machine often cannot help這台機器通常就幫不上忙了。

The word is medical and public-safety English; ordinary families in Taiwan more often point at the box and say AED.

The word這個字 is medical and public-safety English是醫療和公共安全用語; ordinary families in Taiwan more often point at the box and say AED台灣一般家庭比較常直接指著那個盒子說 AED。