The phrase "a new difficult" is not correct and usable in written English.
It seems to be an incorrect combination of words, as "difficult" is an adjective and should not be used as a noun in this context.
Example: "The project presented a new challenge, but we were ready to tackle it."
Alternatives: "a new challenge" or "a new obstacle".
Before the second world war, German science had demonstrated facts which, when war erupted, became crucial: a fissionable component of natural uranium which could produce a nuclear chain reaction; the existence of a possibly fissionable element 93 or 94, and a substantial lead in a new, difficult, but potentially important aspect of civil and weapons research.
However, a new difficult problem has arisen for the proximal ALM-type methods, which is how to determine the optimal value of the proximal parameter τ.
"I'm really grateful to Rob, the club and all the staff because they offered me a contract in a new, difficult situation.
Do you have a minute to so I can explain it better?' Of course that will probably lead to a reply - and thus to a new difficult conversation, but that's not a problem anymore, right.
As every past generation has had to disenthrall itself from an inheritance of truisms and stereotypes, so in our own time we must move on from the reassuring repetition of stale phrases to a new, difficult, but essential confrontation with reality.
Participants are instructed to follow a specific sequence of actions, for example: 'Monitor your fruit consumption', 'Make a plan for a new difficult situation', and 'Adapt plans that are not effective enough'.
This army of millions became a new, difficult-to-control political force, and various veterans' associations sprouted up around the country.
But the tenant blacklist makes finding a new apartment difficult.
Later, Harvey is to find a new, more difficult and mercurial lover, Jack Lira (Diego Luna).
At present, we face a new and difficult environment, and fresh challenges.
With the establishment of the People's Republic of China in 1949, legal education entered a new and difficult period.
