4 sentences

1. 这是木星磁场的声音。

   zhè shì Mù​xīng cí​chǎng de shēng​yīn.

   This is the sound of Jupiter's magnetic field.

   Source: OpenSubtitles

2. 地球有一个巨大的磁场。

   dì​qiú yǒu yī gè jù​dà de cí​chǎng.

   The Earth has a massive magnetic field.

   Source: Dong Chinese Dictionary

3. 磁场是看不见的。

   cí​chǎng shì kàn bù jiàn de.

   Magnetic fields are invisible.

   Source: Tatoeba

4. 电流通过导线时会产生磁场。

   diàn​liú tōng​guò dǎo​xiàn shí huì chǎn​shēng cí​chǎng.

   A magnetic field is generated when an electric current passes through a wire.

   Source: Dong Chinese Dictionary