例句與造句

1. And development foregrounds is that propagation coefficient of the tip meristem culture is high and the range of increasing in yield is clear
   莖尖組織培養(yǎng)前景廣闊，具有繁殖系數(shù)高、增產(chǎn)幅度大等特點(diǎn)。
2. The results of quantitative analysis showed that the pre - tension deformation reduced the fatigue crack propagation threshold and increased the crack propagation coefficient , and consequently decreased the fatigue resistance of the part with mechanical damage
   定量分析表明：預(yù)拉伸變形降低了疲勞裂紋擴(kuò)展門檻值，提高了裂紋擴(kuò)展系數(shù)，從而使管線在機(jī)械損傷的部位疲勞抗力降低。
3. It's difficult to find propagation coefficient in a sentence. 用propagation coefficient造句挺難的