Two-sided means having two sides. That sounds simple, but 'side' pulls in two directions and the word follows both.

Two-sided two-sided means意思是 having two sides有兩面 that sounds simple這聽起來很簡單 but不過 'side'side 這個字 pulls in two directions拉往兩個方向 and而 the word這個詞 follows both兩個方向都跟著

First, physically: paper printed on both faces is two-sided printing; a two-sided coin, a two-sided mirror.

First首先 physically從實體上來說 paper printed on both faces兩面都印刷的紙 is two-sided printing叫two-sided printing a two-sided coin雙面硬幣 a two-sided mirror雙面鏡

Second, and more usefully for you, it means an argument or a situation has two parts that pull against each other — 'The story is two-sided' means there is more to it than the one version you heard. Teachers say 'Every argument is two-sided' to mean both people have some reason on their side. This second use is where the word earns its keep, and it is very often used to gently disagree with someone who is too sure.

Second第二 and more usefully for you而且對你更有用的是 it means它指的是 an argument or a situation一個爭論或情況 has two parts有兩個部分 that pull against each other互相拉扯 'The story is two-sided'「The story is two-sided」 means意思是 there is more to it than the one version you heard事情不只是你聽到的那一個版本 teachers say老師會說 'Every argument is two-sided'「Every argument is two-sided」 to mean意思是 both people have some reason on their side雙方都有各自的一些道理 this second use這第二個用法 is where the word earns its keep是這個詞最有價值的地方 and而且 it is very often used常常被用 to gently disagree with someone who is too sure來委婉反駁一個太篤定的人

A related use is about relationships: something two-sided goes both ways, both people give something — though for that meaning 'mutual' or 'both ways' is what people say far more often.

A related use一個相關的用法 is about relationships是關於關係 something two-sided goes both ways某件雙面的事是雙向的 both people give something雙方都有付出 though不過 for that meaning對於這個意思 'mutual' or 'both ways'mutual或both ways is what people say far more often人們更常這麼說

Be careful with one thing: 'two-sided' is mostly neutral or fair-sounding. If you want to say a person is dishonest, showing one face to one group and another face to another group, English does NOT use 'two-sided' for that — it uses 'two-faced', which is a real insult. The two words look like twins and are not.

Be careful with one thing有一件事要小心 'two-sided'two-sided is mostly neutral or fair-sounding大部分時候是中性、聽起來公平的 if you want to say如果你想說 a person is dishonest一個人不誠實 showing one face to one group對一群人一個樣 and another face to another group對另一群人又是另一個樣 English英文 does NOT use並不會用 'two-sided'two-sided for that來表示這個意思 it uses它用的是 'two-faced'two-faced which is a real insult這才是真正的侮辱詞 the two words這兩個詞 look like twins看起來像雙胞胎 and are not但其實不是