NeXTSTEP already had a fully featured operating system, and could play videos, record sound and embed objects.
NeXTSTEP的操作系统功能已经十分完善，它能播放视频、录制声音、内嵌对象。
A cassette tape recorder can easily record sound on and play sound back from tape.
盒式录音机可以很容易地用磁带录音和放音。
The corpora in this thesis are collected by transcription of record sound in Chinese courtroom.
本文的语料是录音转写来的，转写符号借鉴了国外会话研究的成果。
The corpora in this thesis are collected by transcription of record sound in Chinese courtroom.
本文的语料是录音转写来的，转写符号借鉴了国外会话研究的成果。
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