问题描述：
翻译英语句子1.They were not sure the small machine could really carry voices
1.They were not sure the small machine could really carry voices.
2.From then on,"hello"is often heard when you picked up the telephone.
1.They were not sure the small machine could really carry voices.
2.From then on,"hello"is often heard when you picked up the telephone.
问题解答：
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