However, to ensure the effectiveness of PVT experiments, we need the help of high-performance sampling equipment to ensure the fidelity of the samples in the sampling process.
而为了确保PVT实验的有效性，就需要借助高性能的取样装备，确保采样过程中样品的保真度。
2
Household high-fidelity audio equipment and systems. Methods of measuring and specifying the performance. Part 1: general.
家用高保真音响设备和系统。性能检测和说明的方法。第1部分：总则。
3
High fidelity audio equipment and systems: Minimum performance requirements. Part 13: High fidelity systems for use in vehicles (for example, motor cars) : FM-radio tuner units.