医生告诉她HVS可能导致反复发作的口唇疱疹。

The doctor told her that ___HVS could cause recurrent cold sores.

工程师正在测试变电站中高压系统的绝缘性能。

The engineer is testing the insulation of the ___HVS in the substation.

科学家正在研究人眼视觉系统如何感知不同亮度下的图像细节。

Scientists are studying how the ___HVS perceives image details under varying brightness levels.