Incomplete metamorphosis: Larvae and adult are very similar in morphological structure and living habits, but they are immature in all aspects, and their development goes through three stages: egg, nymph and adult. Such as dragonflies, cockroaches, crickets, locusts and so on. Complete metamorphosis, in individual development, insects go through four stages: egg, larva, pupa and adult, which is called complete metamorphosis. Completely deformed larvae.
Therefore, the word "to death" in "Spring silkworms will weave until they die, and candles will drain the wick every night" is unscientific, because silkworms are not dead, but become inedible pupae. It can be changed to "silkworm chrysalis is exhausted, and tears are exhausted every night."
So the answer is: "to death" is changed to "pupation"; I totally agree.