These are then washed away with acids milder than hydrofluoric.

然后用比氢氟酸更温和的酸将它们洗掉。

Conventionally, highly corrosive chemicals, such as hydrofluoric acid, are used to dissolve impurities.

传统上， 使用高腐蚀性化学品，例如氢氟酸来溶解杂质。

A hydrofluoric acid burn leaches the body's calcium.

氢氟酸烧伤消耗了体内的钙。

It exploded when it touched water, it was lethal when inhaled, and when it decomposed it spit out deadly hydrofluoric acid.

接触水时会爆炸，被吸入时会致死，分解时会释放致命的氢氟酸。