unscreened flank

例句：

1. 1.The unscreened meat was still raw and had a strong smell.
   未经筛选的肉仍然生且有强烈的气味。
2. 2.The unscreened water was contaminated with bacteria.
   未经筛选的水被细菌污染了。
3. 3. The unscreened soil was rich in nutrients but also prone to mold growth.
   未经筛选的土壤富含养分，但也容易滋生霉菌。