Phospholipins
磷脂
🗣️ 情景例句
Thank you.
谢谢 。
The chemist is testing enzymes.
化学家在试验着酶。
for it is then almost ready to undertake heavy work and can begin to earn its keep straight away.
这个年龄的象差不多已能干重活，可以很快挣回饲养它的开支。