Desultory readers are seldom remarkable for the exactness of their learning.

因为标、书不读的人，他们的知识很难是非常精湛的。

He says a kilo is fine for weighing things like potatoes, where extreme exactness is not necessary.

他说，公斤在测量土豆等东西时没有问题，因为这些东西不需要极度精确性。

True, one portrait may hit the mark much nearer than another, but none can hit it with any very considerable degree of exactness.

不错，也许这张画会比另一张画些，可是，要画得维妙维肖却不容易。

They argued that such existing systems could actually complete the problem used in the Google experiment in 2.5 days, and with greater exactness.

他们认为，这类现有系统可以在2。5天内完谷歌在实验中使用的问题，而且准确率会高。