Describes laws and government action meant to stop companies from unfairly controlling a market — crushing smaller firms, secretly agreeing on prices, or acting as one giant so buyers have no real choice.

Describes laws and government action meant to stop companies from unfairly controlling a marketAntitrust形容的是用來阻止企業不公平壟斷市場的法律和政府行動——crushing smaller firms打壓比較小的公司、secretly agreeing on prices偷偷聯合定價、or acting as one giant so buyers have no real choice或聯合成一個巨頭，讓買方沒有真正的選擇。

In American English this is the usual word. The “trust” here is not “I believe you”; it is an old US name for a bundle of companies tied together as one.

In American English this is the usual word在美式英文裡，這是常用的詞。The "trust" here is not "I believe you"這裡的「trust」不是「我相信你」的意思；it is an old US name for a bundle of companies tied together as one而是美國以前用來稱呼一群綁在一起、像一家公司的企業聯合體。

In Britain and Europe people more often say competition law. Formal: news, law, business.

In Britain and Europe people more often say competition law在英國和歐洲，人們比較常說competition law（競爭法）。Formal: news, law, business屬於正式用詞：新聞、法律、商業場合。

If a government “brings an antitrust case,” it is taking a company to court over monopoly or price-fixing. Taiwan business English still uses the American word a lot.

If a government "brings an antitrust case,"如果一個政府「brings an antitrust case（提起反托拉斯訴訟）」，it is taking a company to court over monopoly or price-fixing就是因為壟斷或聯合定價把一家公司告上法庭。Taiwan business English still uses the American word a lot台灣的商業英文還是很常用這個美式說法。