Metamorphosis of an insect may be ametabolous hemimetabolous, or holometabolous. Neuroendocrine and endocrine secretions control metamorphosis. 昆虫的变态可以是无变态型、渐变态型, 不完全变态型和完全变态型. 神经分泌和内分泌控制变态行为.
一块木头被加热到很高的温度.A piece of wood is heated to a high temperature.当被加热时, 金属便膨胀.When when heating, the metal thus expands.水被加热和冷冻时,所产生的作用[反应]不一样.Water behaves in different ways when it is heated and when it is frozen....