to prevent

基本解释

Rent controls were introduced to prevent profiteering.
爲了防止牟取暴利因此實行了租金控制。
dict.cn
The soldiers barricaded the streets to prevent an attack.
士兵們在大街上設置路障，阻止進攻。
The main problem is to prevent others cashing in before we have had time to market the product.
主要問題是在我們沒有來得及在市場上銷售産品之前，防止別人撈一把。

If they had, they would have been tested to see if they needed treatment to prevent an infection like H.I.V.or hepatitis.
It's contracting so the Fed is trying to prevent a serious recession by cutting interest rates; they've been cutting them rapidly.
它在減小,所以美聯儲正在試圖阻止一個因爲利率縮減,而産生的嚴重的經濟衰退；,但是他們最近一直在降低利率。
耶魯公開課 - 金融市場課程節選
In order to keep the currency convertible they had to keep interest rates high to prevent people from demanding the gold.
爲了保持貨幣的轉換性,他們不得不將利率提高,以防人們曏他們索求金子的兌換。
耶魯公開課 - 金融市場課程節選

Ratings would have to be confidential to prevent investors from free-riding on each other.
FORBES: Rethinking Credit Ratings