Daniel's pancreas was removed, but the cancer had already spread to his liver.

VOA: standard.2010.01.12

That messenger RNA that's being used has already gone through the RNA splicing mechanism and so the introns have already been removed.

这个mRNA,已经经过了RNA剪接机制的剪接,切去了内含子

耶鲁公开课 - 生物医学工程探索课程节选