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关注:1
2013-05-23 12:21
求翻译:The megaphone makes the voice sound louder because it points sound waves in one direction and keeps them from ________out in all directions.是什么意思? 待解决
悬赏分:1
- 离问题结束还有
The megaphone makes the voice sound louder because it points sound waves in one direction and keeps them from ________out in all directions.
问题补充: |
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2013-05-23 12:21:38
扩音器,使声音响亮,因为它指向一个方向的声波,使他们从________四面八方。
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2013-05-23 12:23:18
喇叭筒的声音越来越响,因为它在一个方向点声波并让他们在所有方向从________out。
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2013-05-23 12:24:58
The megaphone makes the voice sound louder because it points sound waves in one direction and keeps them from ________out in all directions.
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2013-05-23 12:26:38
喊话器使声音声音大声点,因为它指向一个方向的声波,从而防止它们在所有方向 ________out。
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2013-05-23 12:28:18
麦克风使声音声音变得更吵闹因为它在一指挥中削尖声波和在所有指挥中阻止他们 ________out。
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