The experiments, proved that developmental quality of root system of cutting seedling and lignification degree of root system during seedling-laying are key factors to influence survival rate.

本文通过试验证实了扦插根系发育质量与倒苗时根系木质化程度是影响定植苗成活的关键。

youdao

The rate of rail creep lengthening at the beginning after rail laying on the track is greater than that of the afterward time.

新钢轨上道后的前期，蠕变伸长速率较大，以后逐步降低。

youdao

The rate of rail creep lengthening is not the same at the different time after the new rail laying on the track.

得出新钢轨上道后的不同时期，其蠕变伸长速率是不同的。

youdao

But as the rate of killing remains more or less constant, the insurgents have probably merely become more skilled at laying other kinds of bomb.

ECONOMIST: Iraq's constitution