1、Do you have a single interest or goal that your entire life is devoted to?
你有一個使你全身心投入的興趣或目標嗎？

2、Would a single interest rate for such different economies cause problems?
如此各異的經濟體，卻適用單一利率，會不會造成問題呢？

3、A hierarchical user interest model is a tree whose nodes are the single interest vectors.
一個層次結構用戶興趣模型是一個以單個興趣向量為節(jié)點的樹。

single interest翻譯