词汇	an old man
释义	an old man 老人。
随便看	Self-testing System self-testing unit self-test input self test mode self-test mode self test self-test self testability Self-testability self-testable failure set self test activity self-test adapter self-test and failure warning Self Test and Software Calibration Self-Test Antenna Radiation self-test capability self-test equipment self-test facility self-test factor self-test feedback path self-test function Self-test health self-testimonies self-testimony selftesting