干燥的热风
Harmattan \Har*mat"tan\, n. [F. harmattan, prob. of Arabic origin.] A dry, hot wind, prevailing on the Atlantic coast of Africa, in December, January, and February, blowing from the interior or Sahara. It is usually accompanied by a haze which obscures the sun.
harmattan n : a dusty wind from the Sahara that blows toward the western coast of Africa during the winter