she explained to him the operation of a camera for a long time .several times the head tried to say something,but he could't.
參考答案:是这样意思：她用很长时间向他解释了相机的操作方法，头儿几次试图说什么，但他每能够这样做。
she explained to him the operation of a camera for a long time .several times the head tried to say something,but he could't.
參考答案:是这样意思：她用很长时间向他解释了相机的操作方法，头儿几次试图说什么，但他每能够这样做。