15秒记一个单词第247个：15秒记一个单词第1216个

15秒记一个单词第247个：15秒记一个单词第1216个

protein /'prəʊtiːn/ n. 蛋白质:击收听音频跟读 ↓↓↓ ↓↓↓ ↓↓↓

例句/词组:

essential proteins and vitamins

必不可少的蛋白质和维生素

英语解释：

a natural substance found in meat eggs fish some vegetables etc. There are many different proteins and they are an essential part of what humans and animals eat to help them grow and stay healthy. 蛋白质:

注：一词多义，单词一次只记一种意思即可。

---