flexible control的用法和樣例：
例句
- Preventive control includes all measures taken to prevent the introduction and spread of weeds.
預防性控制包括所有阻止雜草侵入和蔓延的措施。 - But the birth of a labelling system for the control of compliance concerns, occur about genetically modified foods for sampling and analysis methods of research.
但標籤制度的誕生也引起了對符合性控制的關注，由此出現了有關轉基因食品抽樣和分析方法的研究。
