估定
to assess; to estimate the value
固定
to fix; to fasten; to set rigidly in place; fixed; set; regular
固定电话
landline telephone; fixed-line telephone
固定点
fixed point; calibration point
骨顶鸡
(bird species of China) Eurasian coot (Fulica atra)
革故鼎新
to discard the old and introduce the new (idiom); to innovate