שאינם

שאינם

"That are not" or "who are not."

'שאינם' is used here to describe 'students' by introducing a dependent clause specifying those who are not ready.

התלמידים שאינם מוכנים לבחינה יקבלו ייעוץ נוסף.

The students who are not ready for the exam will receive additional guidance.

Here, 'שאינם' is used to modify 'materials,' specifying those that do not naturally decompose.

קיימים חומרים שאינם מתכלים בטבע.

There are materials that do not decompose in nature.

'שאינם' in this sentence serves to describe 'systems' by indicating that they lack dependence on a single source.

עלינו לשאוף למערכות שאינם תלויות במקור אחד.

We must aim for systems that are not dependent on a single source.