anomaly lower threshold的用法和样例：
例句
- The traditional threshold methods are necessary for variables to conform to normal or lognormal distribution, and they have theoretic limitation.
传统计算地球化学异常下限的方法，要求数据服从正态分布或对数正态分布，而且存在计算依据不充分的问题。 - The calculating methods of geochemical anomaly thresholds are very important in mineral exploration and resource prediction.
化探异常下限计算方法在矿产勘查和资源预测中非常重要。
