例句：
Carbolic acid is usually used for cleaning.
石炭酸常用于清洁。
His stomach might rupture from all the acid.
他的胃可能会因为所有这些酸而穿孔。
It is treated with acid before being analysed.
对它先用酸处理再进行分析。
Cars cause pollution, both smog and acid rain.
汽车引起污染，既有烟雾又有酸雨。
These shrubs must have an acid, lime-free soil.
这些灌木必须要有酸性、无石灰的土壤。