Deutoxide
重水
🗣️ 情景例句
Have you ever done supervisory work?
你担任过管理工作吗？
Which train do I take to Philadelphia?
去费城乘哪趟车？
Don't you think it necessary to have a close study of the contract to avoid anything missing?
你不觉得应该仔细检查一下合同，以免遗漏什么吗？