irreplaceable set造句

the pace of this process is slow and careful because this is an absolutely unique, practically irreplaceable set of samples
此项过程的步伐是缓慢而小心的，因为这绝对是独一无二、事实上是无可替代的一批样本。
It's difficult to find irreplaceable set in a sentence. 用irreplaceable set造句挺难的