I look out the window at the train.
网友回答
I look out （加of) the window at the train.
再如：She sat looking out of the train window at the countryside passing by.
她坐着看列车窗外不断掠过的乡村.
======以下答案可供参考======
供参考答案1:
应该说 I look at the train out of the window. 看的是船外的火车，而不是窗户
look at 短语不要拆开写
供参考答案2:
到底要表达什么意思？是透过窗户看到火车还是在火车上看窗户外面？