There occours needle - type or M - type martensite precipitation within retained austenite.残余奥氏体内有针状或“M”型马氏体析出.These lath martensite first nucleates in parent austenite intergranular and twin boundary.应变诱发马氏体首先在原奥氏体晶界和孪晶...
最近的一场雨把瀑布搅成了泥水漩涡。The recent rain had churned up the waterfall into a muddy whirlpool.维多利亚瀑布今年的降雨量超过了平均水平。Victoria Falls has had above average levels of rainfall this year.月亮在瀑布溅起的水雾上照出了一道彩虹。The moon was casting a rainbow...