绘图技术取决于观测者的能力.The technique of the drawing depends on the ability of the observer.对于观测者特别重要的是明暗界线的位置.Of particular importance to the observer is the position of the terminator.观测者要对大气条件作详细记录.The observer should always ma...

“观测者”的英语可以翻译为：observer ...