endogenous gene的用法和樣例：
例句
- Activation of an internal gene requires generation of new sequences.
內源基因的激活需要新序列的產(chǎn)生。 - Only about one out of a million cells will correctly incorporate a foreign gene using the most common versions of this technique.
應用這種最常規的技術(shù)，僅有百萬(wàn)分之一的細胞可以正確加人外源基因。
