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....
Investment could dry up and that could cause the economy to falter.投资可能会中断，而这会引起经济衰退。He finally faltered in the last game of a heroic match.他在这场艰苦比赛的最后一局中踉跄结束。Normal life is at a standstill, and the economy is faltering....