债券
The stethoscope is a medical instrument. 听诊器是一种医疗器械。
This instrument monitors the patient's heartbeats. 这台仪器监听病人的心跳。
The king signed the instrument of abdication. 国王签署了逊位的文告。
A similar board used as a percussion instrument. 敲击板用作打击乐器的一种类似的板
This scientific instrument suffered severely. 这部科学仪器受到严重损坏。
Language is an instrument for communication. 语言是交际的手段。
