1) steadily close in
步步进逼
3) step-by-step method
逐步求解法，步进法，逐步[测量]法，逐步[逼近]法
4) successive approximation
分步逼近
1.
Location study of boundary points with the successive approximation method;
分步逼近法实现界址点定位的研究
5) nearing predicting span
步距逼近
6) progressive approach
逐步逼近
1.
By taking the data sample of a large number of steel performance index data,using the progressive approaching method and mixing analytical method,the quality of the reinforcing bar tension has been measured and analysed.
通过对大量钢材性能指标参数的数据取样,利用逐步逼近方法和组合分析的方法,对钢筋拉伸的质量做出测量与分析的研究。
补充资料：步步
1.一步一步;每步。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条