face-harden解釋vt. 及物動詞 【冶金】使（鐵合金）表面硬化。
The face of the column forms a very accurate slide.
An old man widower, unkempt hair, in bed, with head covered, sighing : an infirm dog, athos : aconite, resorted to by increasing doses of grains and scruples as a palliative of recrudescent neuralgia : the face in death of a septuagenarian suicide by poison
Additional soldiers must be recalled to active duty in the face of this military threat
With your pretty face you will never want admirers.
The territorial gains were given back by the end of the day, especially in the face of effective german aerial attacks