ALS
abbr.
amyotrophic lateral sclerosis
antilymphocyte serum
Approach Light System 【航空学】进场照明系统
autograph letter signed 有签名的亲笔信
Automatic Landing System 【航空学】自动着陆系统
als,a.l.s.
abbr.
amyotrophic lateral sclerosis
anticipated life span 预期寿命,估计寿命
antilymphocyte serum
approach and landing simulator 【航空学】进场与着陆模拟器
autograph letter signed 有签名的亲笔信