我能表达时间的长度。

I can explain length of time.

youdao

询问和表达时间。

Ask about and say time.

youdao

答案是特定细胞中只有一小部分基因在特定的时间被表达或使用。

The answer is that only a small subset of the genes in a particular kind of cell are expressed, or turned on, at a given time.

youdao

So this might be a longer lasting, more permanent form of elimination of expression of a particular gene.

所以这似乎是一种持续时间更长,更长久地阻止某个特定基因表达的方法

耶鲁公开课 - 生物医学工程探索课程节选

Another situation where you can use "I wish" is when you express regret, a desire to stay longer, for example.

另一种使用“I wish”的情况是当你表达遗憾的时候，例如，希望多待一段时间。

I wish 课堂 - SpeakingMax英语口语达人

The rest of the time I want to talk about expression of genes, of new genes.

剩下的时间里我想讲讲基因的表达,新基因的表达

耶鲁公开课 - 生物医学工程探索课程节选