无论延伸多长，平行线永不相交。Parallel lines will never meet no matter how far extended.大路一直延伸到维泰博，之后右转通向博尔塞纳。The main road continues towards Viterbo before turning right to Bolsena.山势在南边一路下倾延伸至农田。To the south the hills dropped away to...
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...