The phrase "a challenge for additional" is not correct and lacks clarity in written English.
It may be intended to describe a situation where there is a challenge related to obtaining or providing additional resources or information.
Example: "The project presented a challenge for additional funding, which we needed to move forward."
Alternatives: "a challenge for extra" or "a challenge for more resources".
Preparing for a natural disaster of this scale presents a challenge for anyone ― but senior citizens can face additional obstacles.
Mice were then treated with either chloroquine (CQ, 50 mg/kg) or quinine (Q, 10 mg/kg) or vehicle (1% ethanol) 30 min prior to subsequent HDM challenges for additional 2 weeks.
Following this, mice were treated with chloroquine (50 mg/kg), quinine (10 mg/kg) or vehicle (1% ethanol) in 25 μl volume by intranasal route 30 min prior to subsequent HDM challenges for additional 2 weeks.
He has refused to agree to further debates with Mr. Simon and failed again today to respond to Mr. Simon's challenge for three additional sessions.
5 These challenges define a need for additional combinations of therapeutics, ideally targeting complementary steps of the viral life cycle, with improved efficacy and safety.
How many times could a conventional company ask its employees to take on an additional challenge for a mere $75 plus the satisfaction of winning?
It concluded: "The cost of private finance schemes is an additional challenge for a limited number of hospitals.
It's not meant to be played around with". By Oct. 17, the team will learn if it has won the $10,000 prize, making them eligible to compete in a second challenge for a chance to win an additional $30,000 in January.
However, as the data traffic exponentially increases in recent years, the wireless communication system has to be faced with a major challenge, which demands for additional bandwidth.
Furthermore, because time is spent increasing the sample size, the investigators may change over the study's course which provides an additional challenge for co-authors to prepare a manuscript.
