This gene comes in two varieties, one of which has a part missing and therefore does not work properly.

这种基因有两种变体，其中一种由于缺失了一部分而不能正常工作。

youdao

So we gonna back up in that previous variation Let's just see if we can pick up what the missing third part here.

我们要回到刚才的变奏,看看我们能不能捕捉到,缺失的第三部分

耶鲁公开课 - 聆听音乐课程节选

In this case, Mr. Insulza flatly ignored the facts by saying: "At the beginning of the video there is a part missing" before the part where 'Mono Jojoy' speaks about supporting the Correa presidential campaign.

CENTERFORSECURITYPOLICY: What's wrong with Insulza and the OAS

Closer examination of the animals' anatomy revealed that the sea slugs had a large part of their penis coiled up in a spiral inside their bodies, which they would then use to replenish their missing part.

BBC: Sea slug's 'disposable penis' surprises

Trust spokesman Mike Collins said the purchase would "complete the missing part of the jigsaw".

BBC: Dover's White cliffs: National Trust appeal breaks ?1m