词汇	first-class class
释义	first-class class 头等舱
随便看	long-distance inquiry system long-distance interaction long distance international circuit long-distance international circuit long distance-inverse PCR long-distance I/O control long distance laser long-distance LD trunk long-distance learner long distance learning long-distance learning Long-distance legal education long distance line long-distance line long distance link long-distance link long-distance links long-distance live video long-distance local long distance localization Long distance location long distance loop long-distance loop long distance low loss transmission long-distance low loss transmission