The lack of knowledge is difficult if not impossible to compensate for later on.

知识的缺乏很难甚至不可能在以后得到弥补。

Replacement is difficult if not impossible.

更换很困难甚至不可能。

Or, if not impossible, at least impossible at the present time.

即使并非完全不可能知道，至少在目前不可能。

Which means a foolproof lie detector is unlikely, if not impossible.

我的意思是测谎仪不可能实现。

It is extremely hard if not impossible to get intimate with the subject.

要和被摄对象变得亲近几乎是不可能的。

And they make it difficult, if not impossible, for workers to speak truth to power.

而且，这会使得雇员们难以甚至是不可能对他们的上司说出自己真实的想法。

Separating children during this time of their development will make integration extremely difficult, if not impossible.

在孩子处于成长时期就把他们隔离开，会把未来的统一变得更难，甚至完全不可能。

After 100 years and thousands of patents, it is difficult, if not impossible, to come up with a short list of IBM s top patents.

经过100年，每年有数千项专利， 要列出一个IBM的“顶级”专利清单是非常困难。

It is very difficult, if not impossible, for the consumer to find out the quality of chocolates by just looking at their appearance in the shop.

消费者即便有可能，也很难在店里仅凭巧克力的外表来判断它们的质量。

Perfectionists often get caught in the endless cycle of regret and blame that makes it difficult, if not impossible, to move on from their mistakes.

完美主义者常常会由于不能或者很难纠正自己的错误而陷于无休止的悔恨和自责中。