试题题干
Translate the following sentence into Chinese.
Naturally, people have wondered whether pigeons might have a built-in compass -- something that would tell them about the direction of the earth's magnetic field.
参考答案
试题解析
考点：wonder想知道；a built-in compass内在的指南针；the direction of the earth's magnetic field地球磁场方向。
句子结构：主句为people have wondered whether pigeons might have a built-in compass，something that···修饰compass。