如果不使用异常，则必须返回错误代码。

Without exceptions, you had to return an error code.

youdao

如果不使用参数引用，抽象范式就与非抽象范式一样。

Other than the use of parameter references, abstract patterns look just like non-abstract ones.

youdao

如果不使用分布式事务，数据可能会重复或丢失。

Without a distributed transaction, the data can be either duplicated or lost.

youdao

And I think many parents believe that if they didn't persist in using these things their children would never learn to speak.

我相信很多父母认为,如果他们不坚持使用这些东西,他们的孩子将永远也学不会说话

耶鲁公开课 - 心理学导论课程节选

And we could not preserve the quality of human life

如果不使用动物做实验，我们就难以保持人类的生活质量，

需要动物实验吗？ - SpeakingMax英语口语达人

That's the crucial thing: if they're not willing, the use of the sign doesn't work, which confirms the idea that nothing can be changed simply by individual agency in and of itself.

这很关键：,如果他们自己不愿意使用，符号就没有意义，这也就应证了我们的观点,没有人能单独改变一个群体符号的使用方式。

耶鲁公开课 - 文学理论导论课程节选