a. 注意观察的, 留心的, 观察力敏锐的

v discover or determine the existence, presence, or fact of

v make mention of

v observe with care or pay close attention to

v watch attentively

v show respect towards

v behave as expected during of holidays or rites

v follow with the eyes or the mind

v stick to correctly or closely

v conform one's action or practice to

s quick to notice; showing quick and keen perception