用者可使用扩音器去录下字句，以便能于每星期练习串字。
You can use a microphone to record words so you can practice your weekly spelling.
对于那些经常用嗓的人，如歌手，职业演讲者，要使用扩音器。
And for people who use their voices a lot, like singers or professional speakers, get voice training and use an amplifier.
因为周围的噪音太大以至于他的正常嗓音不能被人很好的听见，他在每一站都使用扩音器，并且总是号召人们进行救赎。
He USES the megaphone at express stops, where the noise is too great for his voice to be heard ordinarily, and calls for redemption.
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