Optimum ph
[医] 最适pH值
🧩 词语组成解析
氢离子指数\\n[医] 药典; 苯基
🗣️ 情景例句
when she was running for the school board.
在妈妈竞选联合校董会席次时。
Do you go on picnics?
你常去郊游吗？
Ships may be delayed by storms; flights may be cancelled because of bad weather, but trains must be on time.
轮船船期可能因风暴而推延，飞机航班可能因恶劣天气而取消，唯有火车必然是准点的。