急！请问这几句关于时效的英文什么意思﹖

As for long aging times or high temperatures these meta-stable phases usually become first semi-coherent (mismatch dislocation in one crystallographic direction) and later incoherent (no fit to any crystallographic direction of the host matrix), they do not hinder the dislocation movement as effectively as before

大概是指经过一段时间或者高温（时效方法）后，稳定相发生相变，从连续相变成不连续相，导致不能阻止位错运动。这是时效的原理。

谢谢哦，不过我弄明白了，它是指过度时效。亚稳相变为半连续相进而转变为不连续相，无法阻碍位错的进行。

与时效相反，特来纠正一下。

基本正确，最后应该说阻碍位错的运动（滑动）

真专业啊

专业英语不错！！！！