核心问题
We shall not know whether the experiment has been successful until we have received a radio message. (New Concept English, Book 2, L.61) has been successful 是否表示已经成功？
词典解答
请见上条。
We shall not know whether the experiment has been successful until we have received a radio message. (New Concept English, Book 2, L.61) has been successful 是否表示已经成功？
请见上条。