spent acid的用法和樣例：
例句
- Single-pipe filling rising film condensation and crystal desalination is a developed process to treat waste sulphuric acid.
單管填料升膜濃縮結晶脫鹽法是一種治理廢酸液的新工藝。 - The hydrometallurgical process of leaching zinc-containing oxide minerals by titanum white waste acid was investigated.
研究了鈦白廢酸浸出含鋅氧化物料的濕法冶金過程。 - Spilt acid discolored the floor.
潑出的酸弄得地板褪色。 - It is a short cut to use the free acid.
可走捷徑，那就是使用遊離的酸。
