说明：  基于液位控制，虚拟仪器技术就是利用高性能的模块化硬件，结合高效灵活的软件来完成各种测试、测量和自动化的应用。
(Level control based on virtual instrument technology is the use of high-performance modular hardware, combined with efficient and flexible software to complete a variety of test, measurement and automation applications.)