sampling techniques的用法和样例：
例句
- CLAP preprocesses some of the data extracted from the database by random sampling technique, which decreases the running time greatly.
该算法采用随机抽样技术，从数据库中抽取一部分数据进行聚类的预处理过程，这样大大降低了运行时间。 - The quadrat sampling technique is mostly used in plant ecology to study the distribution and abundance of species in plant communities.
其内部的生物体被标记，样方抽样技术多用于植物生态学领域，用来研究某一植物群落中物种的分布及其含量的多少。
