您要查找的是不是：
- The switchboard is manned twenty-four hours a day. 电话总机是一天24小时由人操纵的。
- Microscopes and telescopes are optical instruments. 望远镜和显微镜是光学仪器。
- The hospital imported some surgical instruments. 医院进口了一些外科器械。
- Barbara will man the telephone switchboard till we get back. 我们回来前由巴巴拉管理电话总机。
- The stethoscope is a medical instrument. 听诊器是一种医疗器械。
- The scientist needs some delicate instruments. 这位科学家需要一些精密的仪器。
- This instrument monitors the patient's heartbeats. 这台仪器监听病人的心跳。
- Telescopes and microscopes are visual instruments. 望远镜和显微镜是光学仪器。
- The strings are a category of musical instruments. 弦乐器是乐器的一种。
- Our dentist keeps his instruments in trays. 我们的牙科医生将他的器具放在隔底盘内。
- The dentist picked up several instruments. 那牙科医生把几把器械收拾好。
- switchboard instruments 配电盘仪表
- The orchestra tuned their instruments. 乐队在给乐器调音。
- He told the switchboard girl not to let her in. 他吩咐电话总机的女孩别放她进来。
- A section of a telephone switchboard. 电话总机板电话交换机的一部分
- All rooms are linked to the main switchboard . 所有的房间都与主开关连接。
- Several members of the orchestra are tuning up their instruments. 乐队中有几个成员正在调他们的乐器。
- He reflected that the quality of the instruments was good anyway. 他寻思，不管怎样，这些乐器的质量还是不错的。
- These instruments are finely set. 这些仪器是经过精密调整的。
- Do you remember to ask the switchboard to put my call through to the boardroom? 你记住请总机把我的电话接到董事会的会议室？
