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blowing down

  • 拉开:在数学中,拉开(法文:éclatement,英文:blowing up)、单项变换或σ-过程是一种几何的操作,代数几何中的应用尤重。拉开是双有理几何的基本工具。对代数簇或复流形上一点Z的拉开是将该点换为该点法丛的射影丛,或者具体地说是换为该点切空间的射影空间,从而得到拉开态射Bl_Z:~→M,这是一个双有理等价。对较高维子流形也能定义拉开。

双语例句

  1. There's a funny smell of soot blowing down the chimney.
    烟囱里倒灌进一股刺鼻的煤烟。
  2. The wind–the wind! There's a funny smell of soot blowing down the chimney.
    风啊——风啊! 烟囱里倒灌进一股刺鼻的煤烟。
  3. Trees have fallen, limbs are blowing down and debris is scattering the roads.
    树被刮倒,树枝也被刮落,路上到处都是残瓦碎片。

网络短语

  • blowing-down
    休风
  • emergency blowing-down
    紧急休风
  • blowing-down operation
    停炉操作
  • blowing down burden material
    休风料
  • down blowing gas
    下吹制气

同义词

吹除;停炉;停风

英英释义

  • In mathematics, blowing down is a type of geometric modification in algebraic geometry. It is the inverse operation of blowing up.