只要…就;只有，只有當…;除非
[例句]Perhaps , but only if the state-owned company is willing to make some changes.
也許吧，但只有這家國有企業願意做壹些改變，才可能脫離困境。
on condition that
若是…，以…為條件
[例句]The united states agreed to this on condition that any re-entry talks took into account the regional block 's pro-democracy principles.
如果任何重新加入的談判能重視到區域阻滯支持民主原則，美國認可這壹決定。
provided that
英[pr?vaidid ?t] 美[pr?va?d?d ?t]
假如，設若
[例句]Most of them will accept moderately higher tax rates , provided that spending cuts and the total savings package are big enough.
大多數商界領袖都願意接受適當的增稅，只要減支幅度夠大、開支節省方案規模夠大。
請采納~