例句與造句

1. Directional solidified cu - cr in - situ composites have high strength , high electricity but without such problems of interfacial contamination and low stability as in the conventional man - made synthetic composites due to self - driven engender in the process of directional solidification , so this composites are expected to be used as contact cable , which is made for trunk line electrification
   定向凝固cu - cr自生復(fù)合材料由于具有高強度、高導(dǎo)電性，同時因其在凝固過程中自動形成而避免了人工復(fù)合材料中長期存在的界面污染、穩(wěn)定性差等不足，因而在電氣化鐵路用電車線材方面有廣闊的應(yīng)用前景。
2. It's difficult to find trunk line electrification in a sentence. 用trunk line electrification造句挺難的