The identification of the crash victims was a long and difficult task.

鉴别坠机意外伤亡者的工作费时而且困难重重。

《牛津词典》

Much like your personal identification number (PIN), your password is your secret; if you choose your password well, it's likely difficult for others to guess it at random.

与您的个人识别号码(PIN)相同，您的密码也是保密的，如果您选择了合适的密码，那么其他的人将很难猜到它。

youdao

Therefore, text parsing in these languages requires the identification of word boundaries, which can be a very difficult task.

因此，这些语言中的文本解析需要标识单词的分界，而这是一项十分困难的工作。

youdao

Early identification of the disease may be difficult because many infected people do not show any immediate symptoms.

VOA: special.2010.01.04

Underwater visibility in the Foyle is very poor at the best of times making identification difficult.

BBC: Experts to examine River Foyle, Derry, wreck

"Reported rates of suicide in other parts of India are low because identification of suicides is difficult, owing to inefficient civil registration systems, non-reporting deaths, variable standards in certifying deaths, and the legal and social consequences of suicide, " he says.

BBC: NEWS | South Asia | South India suicide is world high

Unfortunately, because the international infrastructure concerning plant pathology is not well developed, the identification of a deliberate release of a pathogen is difficult to ascertain.

CENTERFORSECURITYPOLICY: Guess Who��s Coming to Dinner?