为了能够有效地从沙层中获得水分，植物的根系的伸长的速度必须大于湿沙层下降的速度。
In order to absorb water, the speed of root elongation in plants must surpass the speed of the humid soil layer moving down.
有效硫化体系的断裂伸长率、拉伸强度、撕裂强度、耐磨性、抗热氧老化性能最好。
The elongation at break, tensile strength and tearing strength of the HVSSBR cured with EV system are the best.
试样表面镀锡使ADI的抗拉强度和伸长率下降，镀锡层不能有效防止ADI的水脆化。
Soldering on ADI surface decreased the ADI tensile strength and elongation, and solder coating could not prevent from water embrittlement.
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