only if

短语
大学

只要...就

教材释义与例句

连词

只有当

连词

只要；除非；只要…就

释义与例句

conj.
  1. 1.

    Not unless; used to introduce a necessary condition.

    只有...才

    The company will succeed only if it has sufficient backing.

    This is a somewhat paradoxical conclusion, and we can be happy to learn that it follows only if we can trust, precisely and in detail, the assumed way in which the probability of occurrence of a deviation decreases as the size of that deviation increases.