0 a person who watches what happens but has no active part in it -- 觀察者，觀察家
UN observers are monitoring the ceasefire. 聯合國觀察員在監督此次停火。
observers of the political situation/political observers 政治觀察家
The observers signaled whether the sharp upper edges were on the left or on the right.
The dispute thus centred on the value of visual evidence from different observers during the famine and in the past.
Quantitative studies may be virtually impossible when the observer is at ground level and the canopy 30- 50 m high.
To reduce the observer effect, the researcher visited the participants' homes before the observation session and interacted with all the family members.
As mentioned above, interrater reliability was checked during 20 home visits with two observers.
For each stimulus, the observer judged whether the overlay appeared transparent or not.
However, the data for some observers do show steplike transitions between some color samples, which may reflect intermediate color categories.
In contrast, when observers were asked to reach for the targets (without seeing their hand) the convergence yielded nearer reaches, and the divergence farther reaches.
