At precent, I give you one affirmation without ways.

目前我没法给你一个肯定的答复。

The bridge is the world's largest span arch bridge at precent.

该桥为目前世界上跨径最大的拱桥。

It points out that the precent ecosystem in Xiaozhangzhuang village is stable but inefficient.

指出目前小张庄村生态系统是稳定的，但效率低。

In precent electronic information age, a mass of traditional files needed to be digital processed.

在当今的电子信息时代中，需要对大量的传统文档进行数字化处理。

And the precent MAP and PDA algorithms can be considered both as the special cases of the proposed algorithm.

现有的MAP算法和PDA算法可以看作是该算法的两种特殊情况。