However, the weight gain was not permanent in every case, lasting only long enough for the infected person to build up resistance to the virus.
然而，这种原因的体重的增加都不是永久的，它只会持续到感染者有能力足以抵抗该病毒为止。
2
The results show that best permanent deformation resistance can be got when continuous dense gradation, which has even arrangement of coarse and fine aggregate is adopted.
结果表明，采用粗细集料搭配均匀的连续密级配和适中的沥青用量可以获得最佳的抗永久变形能力。
3
The new material is not only oil resistant, but also has fairly great improvement in performance of high temperature resistance, fatigue resistance and permanent deformation resistance.