observer

观察者；[天] 观测者；遵守者英释中释nsomeone who regularly watches or pays attention to particular things, events, situations etc

1 observer pattern,观察者模式

2 observer status,n. 观察员身份

1 political observers.政治观察员

2 Observers are predicting a fall in interest rates..观察员预测利率会下降。