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汉语拼音：zhǐ nán zhēn

1.利用可以转动的磁针制成的测定方向的仪器。因受地磁场的作用，针的一头大体上指向南方，利用这一性能，可以辨别方向，常用于航海、旅行和行军中。是中国古代四大发明之一。

2.比喻指导行动的准则。

1. 利用磁针指着南北两方的性能制成的指示方向的仪器。是我国古代重大发明之一。参阅 宋 沉括 《梦溪补笔谈·药仪》。

2. 比喻辨别正确方向的依据。

   明 王守仁 《传习录》卷下：“这些子看得透彻，随他千言万语，是非诚伪，到前便明……真是箇试金石、指南针。” 鲁迅 《两地书·致许广平二》：“假使我真有指导青年的本领……我决不藏匿起来，但可惜我连自己也没有指南针，到现在还是乱闯。”

• a map and compass

  地图和指南针

• We had to rely on a compass and a lot of luck to get here.

  我们不得不依靠指南针和不错的运气找到这儿来。

• The compass is the invention that China is started in the origin.

  指南针是源出于中国的发明.

• The needle of the compass shows that we're facing south.

  指南针上的磁针显示我们处在朝南的位置.

• He did not need a compass to tell him where south - west was.

  他不需要指南针告诉他西南方在哪儿.

• An iron case will keep the earth's magnetism away from the compass.

  铁箱子能使地球磁力不影响指南针.

• Nearly two thousand years have passed since our ancestors invented the compass.

  自从我们的祖先发明指南针以来,将近两千年过去了.

• He had checked it with his compass.

  他用指南针测定过它.

• We can use an indicator with a pointer or a continuous recording device.

  我们可以使用有指南针的指示器,或是连续记录的装置.

• Croft took a sight with his compass in the direction he wanted to travel.

  克洛夫特凭着指南针目测了一下预定的行进方向.

• Map and compass : In case you wander from the trail.

  地图和指南针: 迷路时用得上.

• An iron case will keep the Earths field away from the compass.

  铁箱能使地球磁场不受指南针的影响.

• He was beginning to doubt the accuracy of his compass.

  他开始怀疑指南针的准确性.

• The captain uses a compass to find directions sails.

  船长在航海时用指南针来辨别航行方向.

• We count on a compass to find our orientation.

  翻译我们依靠指南针来确定我们的方位.