If one thing is proportional to another, they stay in a matching relationship of size, amount, or importance. When one grows, the other grows in a steady way.

If一 one thing is proportional to another一個東西跟另一個成比例 they它們 stay in a matching relationship of size, amount, or importance就會在大小、數量或重要性上保持對應的關係。When one grows一個變大時 the other grows in a steady way另一個也會穩定地跟著變大。

In maths you hear “y is proportional to x,” and also directly proportional (same direction) and inversely proportional (one up, the other down).

In maths在數學裡 you你 hear會聽到 "y is proportional to x,""y is proportional to x（y和x成比例）" and also directly proportional (same direction)還有directly proportional（正比，同方向） and inversely proportional (one up, the other down)以及inversely proportional（反比，一個上一個下）。

Outside maths, a proportional share is a fair slice next to the whole. Proportional representation is a voting system where seats match votes.

Outside maths在數學之外 a proportional share所謂proportional share is a fair slice next to the whole是相對於整體來說公平的一份。Proportional representationProportional representation（比例代表制） is a voting system where seats match votes是一種席次和得票數相對應的投票制度。

It is a school, news, and official word. Though actually people sometimes stretch it to mean “fair” or “not too much,” which is close but looser than a steady matching relationship.

It它 is a school, news, and official word是個學校、新聞和官方場合會用的字。Though actually不過其實 people大家 sometimes stretch it to mean "fair" or "not too much,"有時候會把它用得比較鬆，指「公平」或「不會太過分」 which is close but looser than a steady matching relationship這跟原本穩定對應的關係意思相近，但比較鬆散。