low-level language

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ITA's hackers seem to be unusually smart, and C is a pretty low-level language.
ITA似乎有一批非常聰明的黑客，而C語言又是一種很低層次的語言。
blog.sina.com.cn
In this setup, the core application -- often with rather strict performance requirements -- is written in a low-level language, such as C language, to get the most from the hardware.
在此設置中，核心應用程序——通常具有非常嚴格的性能要求——採用低級語言編寫（如 C 語言），以盡可能地利用硬件。
The first one is, whether this is a high-level or low-level language.
第一個是，不琯這是一個高級或者是低級的語言。

A low-level language, we used to call this assembly programming, you're down at the level of, your primitives are literally moving pieces of data from one location of memory to another, through a very simple operation.
一個低級的語言，我們曾經將其稱爲假設編程，你們衹是処於用基本要素，把一些數據碎片,從記憶存儲器的一個地方，通過簡單的操作來轉到另外一個地方。
麻省理工公開課 - 計算機科學及編程導論課程節選
The first one is, whether this is a high-level or low-level language.
第一個是，不琯這是一個高級或者是低級的語言。
麻省理工公開課 - 計算機科學及編程導論課程節選

While extremely flexible, its programming language, BD-Java, requires lots of low-level code for even the simplest of instructions.
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An assembly language is a low level language and it is tedious to write applications in it compared to high-level languages.
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a language for writing computer programs that is similar to machine code (= a set of numbers that gives instructions to a computer)

a computer programming language that is closer to machine language than to human language &rarrcompare high-level language