watch·ful /ˈwɑʧfəl, ˈwɔʧ-/
  (a.)注意的,警戒的,警醒的
  Watch·ful a. Full of watch; vigilant; attentive; careful to observe closely; observant; cautious; -- with of before the thing to be regulated or guarded; as, to be watchful of one's behavior; and with against before the thing to be avoided; as, to be watchful against the growth of vicious habits.  “Many a watchful night.” --Shak. “Happy watchful shepherds.” --Milton.
     'Twixt prayer and watchful love his heart dividing.   --Keble.
  Syn: -- Vigilant; attentive; cautious; observant; circumspect; wakeful; heedful.
  -- Watch*ful*ly, adv. -- Watch*ful*ness, n.
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  watchful
       adj 1: carefully observant or attentive; on the lookout for
              possible danger; "a policy of open-eyed awareness";
              "the vigilant eye of the town watch"; "there was a
              watchful dignity in the room"; "a watchful parent with
              a toddler in tow" [syn: argus-eyed, open-eyed, vigilant,
               wakeful]
       2: experiencing or accompanied by sleeplessness; "insomniac old
          people"; "insomniac nights"; "lay sleepless all night";
          "twenty watchful, weary, tedious nights"- Shakespeare
          [syn: insomniac, sleepless]