cloud·less /-ləs/
  (a.)晴朗的,無雲的
  Cloud·less, a. Without a cloud; clear; bright.
     A cloudless winter sky.   --Bankroft.
  -- Cloud*less*ly, adv. -- Cloud*less*ness, n.
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  cloudless
       adj : free from clouds; "under a cloudless sky" [syn: unclouded]