久久国产欧美日韩精品,日韩国产精品久久久久久亚洲,99视频精品全部免费免费,91精品国产综合久久走光

  • microseconds怎么讀

    microseconds的音標(biāo):...
  • microseconds例句

    The dynamic SIF variation was found to lag behind the stress - pulse imingement by several microseconds.動(dòng)態(tài)應(yīng)力強(qiáng)度因子的變化發(fā)現(xiàn)滯后于應(yīng)力脈沖沖擊幾微秒.The dynamic SIF variation was found to lag behind the stress - pulse impingement by severa...