如果糖尿病长期不治疗，会导致严重的并发症。

If diabetes remains ___untreated for a long time, it can lead to serious complications.

这些水果未经处理和清洗就直接出售了。

These fruits are sold ___untreated and unwashed.

他的伤口因为没有得到治疗而感染了。

His wound got infected because it was left ___untreated.