2 sentences

1. 这种硬币含有一定比例的镍。

   zhè zhǒng yìng​bì hán​yǒu yī​dìng bǐ​lì de niè.

   This coin contains a certain percentage of nickel.

   Source: Dong Chinese Dictionary

2. 地球的内核主要由铁和镍组成。

   dì​qiú de nèi​hé zhǔ​yào yóu tiě hé niè zǔ​chéng.

   The Earth's inner core is primarily composed of iron and nickel.

   Source: Dong Chinese Dictionary