Episulfide
环硫化物
🗣️ 情景例句
Did you have dinner, Robbie?
你吃晚餐了吗， Robbie？
He gave me a chest X-ray and took my blood pressure.
他给我做了X光检查并且量了我的血压。
No, Mom, said Lucy. I forgot the money!
“没有，妈妈，”露西说，“我忘记带钱了！”