Now it seems the scientists underestimated the turtles' abilities, with research showing they use Earth's magnetic field to create a mental map that covers all four points of the compass.
现在看来，科学家似乎低估了海龟的能力。研究表明海龟利用地球磁场为自己确定的地图可涵盖东西南北四个方位。
The majority of the metro stations have four exits , which logically enough were formerly specified by the points of the compass.
多数地铁站都有四个出口，以前是极合理地以方位标出。
The majority of the metro stations have four exits , which logically enough were formerly specified by the points of the compass.
多数地铁站都有四个出口，以前是极合理地以方位标出。
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