聽力每日練習(xí) listen 2768 Light?or?heavy?use

1-- I've just got a new printer. How often do I need to replace the print heads?
 
2--Well, under normal conditions each head lasts about 5 000 copies or so. It depends on the user, but about once a month is average.
 
1-- So if I don't print out very much, it could last a lot longer?
 
2-- That's right. It could last six months or more. This model's designed for heavy use. Don't worry - you'll get an error message telling you when to change the head.
 
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注解：
 
1.printer打印機
2.normal conditions正常情況
3.designed 設(shè)計
 
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譯文：
 
1--我剛買了個新的打印機。我多長時間需要更換一次打印頭？
2--哦,在正常情況下每個打印頭能夠打印5000張左右。這要看用戶的具體情況了，但是一般平均一個月一次。
1--那么如果我打印的不是很多，它能使用很長時間嗎？
2--對?？梢杂昧鶄€月以上。這個模塊的設(shè)計是為重型打印機使用的。不用擔(dān)心，你會得到錯誤信息什么時候需要更換打印頭。