If something is modular, it is made of separate parts or units that you can put together, often in different combinations. Think of a sofa in sections, a kitchen of matching boxes, a school course made of optional units, or a machine whose pieces you can swap. The point is not only “it has parts”; the parts are meant to fit, come apart, and join again in a new way.

If something is modular如果某樣東西是modular（模組化的）, it is made of separate parts or units代表它是由獨立零件或單元組成 that you can put together可以組合起來的, often in different combinations而且常常可以用不同方式組合。Think of想想 a sofa in sections分節的沙發, a kitchen of matching boxes由一格格相配的箱子組成的廚房, a school course made of optional units由選修單元組成的學校課程, or a machine whose pieces you can swap或零件可以替換的機器。The point is not only “it has parts”重點不只是「它有零件」; the parts are meant to fit這些零件是設計來可以拼上的, come apart拆開, and join again in a new way再用新方式拼回去。

Though actually, people stretch it: a modular home is built from factory sections; musicians talk about modular synthesizers. In higher maths you may later meet modular arithmetic, which is a specialist use of the same family — not this everyday sense.

Though actually不過其實, people stretch it這個詞也會被延伸使用: a modular home modular home（模組化住宅） is built from factory sections是用工廠預製的區塊蓋成的; musicians talk about音樂人也會談 modular synthesizers modular synthesizers（模組化合成器）。In higher maths在更高階的數學裡 you may later meet你之後可能會遇到 modular arithmetic modular arithmetic（模數運算）, which is a specialist use of the same family那是同一個字族的專業用法 — not this everyday sense不是這裡講的日常意思。