a. 注意观察的, 留心的, 观察力敏锐的

[ adj ]
quick to notice; showing quick and keen perception
<adj.all>

Observe \Ob*serve"\ ([o^]b*z[~e]rv"), v. t. [imp. & p. p.
{Observed} ([o^]b*z[~e]rvd"); p. pr. & vb. n. {Observing}.]
[L. observare, observatum; ob (see {Ob-}) + servare to save,
preserve, keep, heed, observe: cf. F. observer. See {Serve}.]
1. To take notice of by appropriate conduct; to conform one's
action or practice to; to keep; to heed; to obey; to
comply with; as, to observe rules or commands; to observe
civility.

Ye shall observe the feast of unleavened bread.
--Ex. xii. 17.

He wolde no such cursedness observe. --Chaucer.

Must I budge? Must I observe you? --Shak.

With solemn purpose to observe
Immutably his sovereign will. --Milton.

2. To be on the watch respecting; to pay attention to; to
notice with care; to see; to perceive; to notice; to
discover; as, to observe an eclipse; to observe the color
or fashion of a dress; to observe the movements of an
army; to observe an accident.
[1913 Webster +PJC]

3. To express as what has been noticed; to utter as a remark;
to say in a casual or incidental way; to remark.


Observing \Ob*serv"ing\, a.
Giving particular attention; habitually attentive to what
passes; observant[1]; as, an observing person; an observing
mind. -- {Ob*serv"ing*ly}, adv.