| 单词 | portable instrument |
| 例句 | DEFINITIVE EXAMPLES 权威例句〔accordion〕A portable instrument with a small keyboard and free metal reeds that sound when air is forced past them by pleated bellows operated by the player.手风琴：可移动的带很小的键盘和活动的金属簧片的乐器，由演奏者启动褶状风箱迫使风通过簧片而发声美国传统〔peak flow meter〕A portable instrument that detects minute decreases in air flow, used by people with asthma to monitor small changes in breathing capacity.峰流表：一种检测气流细微流动的袖珍式仪器，气喘病人用来监测呼吸量微小变化美国传统 |
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