a challenge means that the coach argues the call. play under review means that the referees are unsure about the call and want a better look at it. the two sometimes overlap
There really is no difference
The project status is currently under review.
the difference between 17 and under 17 years old is that under means younger than 17 and 17 is just 17.
There's no difference their both under the Department of the Navy.
the difference between the third and over the third or under the third line is that they are difference
Under rational-basis review, courts evaluate the constitutionality of a law by determining if there is a rational connection between the law and a legitimate government interest.
The project is currently under review.
An example of a question that includes the keyword "under review" could be: "Why is my job application still under review after two weeks?"
population
Involuntary is not under your control while voluntary is.
By definition, there is no difference. A dictionary will mention as one of its definitions "to create" under defining "procreate".
The project under review is currently being evaluated, and a decision on its progress or approval is pending.