algebra

algebra — 名詞

1. the branch of mathematics where letters such as x and y stand in for unknown num

1.名詞B1
釋義

代數

用字母代替未知數的數學分支

the branch of mathematics where letters such as x and y stand in for unknown numbers, and rules are used to work out what those numbers are.

例句

Dimitri found algebra easier than geometry once her teacher explained how to solve for x.

Dimitri 一旦聽老師說明如何解出 x，就覺得代數比幾何容易。

uncountable: 'algebra' takes no article

Most students in Taiwan begin learning algebra in their first year of junior high school.

台灣多數學生在國中一年級開始學代數。

collocation: learn / study + algebra

文法句型

uncountable noun, no plural

用法筆記

Uncountable in everyday use: never 'an algebra' or 'algebras'. The plural form appears only in advanced mathematics, where it refers to specific abstract systems and is rare outside university textbooks.

常見錯誤

❌I have two algebras tomorrow.
✅I have two algebra classes tomorrow.
💡algebra itself is uncountable; add a counter noun like 'class' or 'lesson'.
❌She is studying an algebra.
✅She is studying algebra.
💡no article before the subject name.