大致计算；揣测to estimate; to reckon

• 概略估计

  rough estimate

• 错误估计

  miscalculation

• 对自己估计过高

  have an overly high estimation of oneself

• 据我估计

  by my reckoning

• 无法估计

  be impossible to guess

• 对目前形势的估计

  appraisal of the current situation

• 损失难以估计

  hard to estimate the losses

• 对情况估计不足

  underestimate the situation