n the act of observing; taking a patient look
v look attentively
v follow with the eyes or the mind
v see or watch
v observe with attention
v be vigilant, be on the lookout or be careful
v observe or determine by looking
v find out, learn, or determine with certainty, usually by making an inquiry or other effort
vt. 观看, 守望；监视, 注意（watch现在分词）