This is a kind of mineral that hisses and bubbles violently when it comes into contact with acids like vinegar. Many translations translate this phrase as "a wound."
# sings songs
You may need to make explicit what kind of songs the singer sings. AT: "sings happy songs" (See: [[rc://en/ta/man/translate/figs-explicit]])
# a heavy heart
The heart is a synecdoche for the whole person. AT: "a sad person" (See: [[rc://en/ta/man/translate/figs-synecdoche]])