assembler
noun [ C ] computing specialized uk/əˈsem.blər/ us/əˈsem.blɚ/
（计算机的）汇编程序
a program that changes computer instructions into machine code (= a set of numbers that gives instructions to a computer)
（计算机的）汇编语言
assembly language (= the language used to write a computer program before it is turned into machine code)