molecular beam maser

例句：

1. 1.The molecular beam maser is used to study the properties of materials at the atomic level.
   分子束激光器用于研究材料的原子级特性。
2. 2. The molecular beam maser was developed by a team of scientists in the 1960s.
   分子束激光器是在20世纪60年代由一个科学家团队开发的。
3. 3. The molecular beam maser has been used in various applications, including material analysis and surface modification.
   分子束激光器在各种应用中都有使用，包括材料分析和表面改性。