Hydropyrophosphate
焦磷酸氢盐, 酸式焦磷酸盐
🗣️ 情景例句
going to the children's ward once or twice a week
每星期就去小儿科病房一、两次
So far, so good.
到目前为止还好。
The are no batteries in the radio.
收音机里没电池。