| 单词 | 有开关 |
| 例句 | DEFINITIVE EXAMPLES 权威例句〔swell box〕A chamber housing one or more sets of organ pipes and having shutters that can be opened or shut to regulate the volume.琴箱：内装一套或几套风琴管的音箱，设有开关可调节音量美国传统 |
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