selected marker的用法和樣例：
例句
- A new strategy that offers a approach for the elimination of those disadvantages caused by the selectable marker gene is developed.
為了消除這些弊端，一種全新的發展策略即獲取無選擇標記的轉基因植物應運而生。 - One is the utilization of bio-safe positive selective markers which are genes mainly related to metabolism of auxins and carbohydrates.
一是選用安全的正向選擇標記，主要是與糖代謝和激素代謝相關的基因。
