Purines
(purine 的复数) n. 嘌呤\\n[化] 嘌呤
🗣️ 情景例句
Can you give me a hand with my homework?
你能帮忙教我做家庭作业吗？
He may well be contented who need neither borrow nor flatter.
一个既不用借债又不用奉承人的人，可以称得上心满意足。
Being a mother is not easy.
做一个母亲是不容易的。