Because some are very difficult to judge with the naked eye.

因为有些是凭肉眼很难判断的。

youdao

It is very difficult to judge fault reason quickly and accurately when autoloader has troubles.

自动装弹机发生故障时很难快速准确地判断故障原因。

youdao

That leaves the United States, and the real strength of the U.S. recovery is still very difficult to judge.

这样，美国的状况以及美国复苏的真正力道还不好判断。

youdao

Dame Jenni said the prize had been "very difficult" to judge because the shortlisted books spanned five very different categories - poetry, children's, biography, first novel and novel.

BBC: Hilary Mantel wins Costa Book Award

"In my judgement an informed and fair-minded observer would recognise that the intention of Parliament was that we should equip ourselves where possible with sufficient expertise to deal with the very difficult and very important questions we have to determine, " said the judge.

BBC: Can a spook judge the spooks?