要不是约翰，布莱恩不会了解真相。

If not for John, Brian wouldn't have learned the truth.

《柯林斯英汉双解大词典》

除非我们了解有某种疾病的人，否则我们不会了解疾病。

We cannot understand disease unless we understand the person who has the disease.

《柯林斯英汉双解大词典》

除非你走近中国，否则你不会了解它。

You'll not know China unless you go closer to it.

youdao

Something is usually said about Kafka in connection with Wise Blood, but I have never succeeded in making my way through The Castle or The Trial, and I wouldn't pretend to know anything about Kafka.

经常有人说到卡夫卡,与《慧血》之间的联系，但我从来没有成功地,读懂《城堡》或者《审判》,我不会假装我了解卡夫卡的一切。

耶鲁公开课 - 1945年后的美国小说课程节选

For people whom that didn't mean anything, it doesn't matter. We're not going to calculus today.

那些不了解微积分的同学,不必担心,我们今天不会用微积分

耶鲁公开课 - 博弈论课程节选

Basically, injecting it into some test subjects, making sure that they didn't get diseased from it and looking at antibody responses to see if it worked and it did.

他们把疫苗接种到测试对象体内,确定接种者不会感染疾病,同时观察抗体的应答反应,了解疫苗是否有效

耶鲁公开课 - 生物医学工程探索课程节选