4 sentences

1. 问题是这些颗粒正在进入食物链。

   wèn​tí shì zhè​xiē kē​lì zhèng​zài jìn​rù shí​wù​liàn.

   The problem is that these particles are entering the food chain.

   Source: CCMatrix

2. 这些颗粒将太阳的一些热量反射回太空。

   zhè​xiē kē​lì jiāng tài​yang de yī​xiē rè​liàng fǎn​shè huí tài​kōng.

   These particles reflect some of the Sun’s heat back into space.

   Source: CCMatrix

3. 咀嚼的动作把大块的食物分解成可以被消化的小颗粒。

   jǔ​jué de dòng​zuò bǎ dà​kuài de shí​wù fēn​jiě chéng kě​yǐ bèi xiāo​huà de xiǎo kē​lì.

   The act of chewing breaks down large pieces of food into small particles that can be digested.

   Source: CCMatrix

4. 流星是尘埃和岩石的颗粒，当它们穿过地球大气层时通常会燃烧。

   liú​xīng shì chén'āi hé yán​shí de kē​lì, dāng tā​men chuān guò dì​qiú dà​qì​céng shí tōng​cháng huì rán​shāo.

   Meteors are particles of dust and rock that usually burn up as they pass through Earth's atmosphere.

   Source: CCMatrix