1) 翻譯：學(xué)好英語的訣竅是要有強烈的學(xué)習(xí)和練習(xí)意愿。

A strong willingness to learn and practice is the recipe for English fluency.

學(xué)好英語 --> English fluency; 強烈的學(xué)習(xí)和練習(xí)意愿注意分成分：強烈的意愿? <-- 學(xué)習(xí)和練習(xí)

2) Unsanitary living conditions are a recipe for the spread of disease.

3) 搭配：

[搭配]PHRASES

a recipe for disaster/success

導(dǎo)致災(zāi)禍的原因；成功的訣竅

To live every day to the full is a recipe for happiness.

快樂的秘訣就是每天都活得充實。