A pact is a formal agreement between two sides — countries, groups, or sometimes people — usually to help each other or to stop fighting. It is heavier than a casual “I promise.” When newspapers say two countries signed a pact, they mean a serious deal, often written down: a peace pact, a defence pact, a pact between political parties. The word feels a little formal, and a little solemn next to deal or agreement, which is why writers like it when they want a serious tone.

A pact這個字 is是 a formal agreement正式協議 between two sides雙方之間——countries, groups, or sometimes people國家、團體，或有時是個人——usually通常 to help each other or to stop fighting是為了互相幫助，或為了停止衝突。It它 is heavier than比...要來得重 a casual "I promise."隨口說的「我保證」。When newspapers say當報紙說 two countries signed a pact兩個國家簽了一項pact，they他們 mean指的是 a serious deal一項嚴肅的協議，often written down常常是寫下來的：a peace pact, a defence pact, a pact between political parties和平協定、防禦協定、政黨之間的協定。The word這個字 feels a little formal, and a little solemn感覺有點正式，也有點莊重 next to deal or agreement比起deal或agreement，which is why writers like it這就是為什麼作者會喜歡用它 when they want a serious tone當他們想營造嚴肅語氣時。

Though actually, people stretch it. Friends may joke about a pact to go to the gym every morning, and that is play, not a legal paper. The tidy picture in the dictionary is the public, formal kind.

Though actually不過事實上，people人們 stretch it會延伸它的用法。Friends朋友之間 may joke about可能會開玩笑說 a pact to go to the gym every morning一項每天早上去健身房的pact，and而 that那 is play是玩笑，not a legal paper不是一份法律文件。The tidy picture in the dictionary字典裡整齊的畫面，is指的是 the public, formal kind公開、正式的那一種。

In modern English it is almost always a noun. Using it as a verb is rare, and you can ignore that for now. A treaty is often the bigger, more official international kind; pact is a wider word and can sound slightly looser, though still serious.

In modern English在現代英語裡，it它 is almost always a noun幾乎都是名詞。Using it as a verb把它當動詞用 is rare是很少見的，and而 you你 can ignore that for now現在可以先不管它。A treatytreaty這個字 is often通常是 the bigger, more official international kind比較大、比較正式的國際級協議；pactpact這個字 is a wider word是一個更廣泛的字 and can sound slightly looser聽起來可能稍微鬆一點，though still serious但仍然是嚴肅的。