Pentacid
a. [化]五价的
🗣️ 情景例句
Good idea.
好主意。
Grand Central Station, please. I want to try to catch a 6:00 train.
请到中央火车站。我要赶六点的火车。
It is not a simple competition for a fixed amount of food determined by the physical environment,
它已不是为了争得物质环境所决定的有限食物而进行的简单竞争了，