“落下”怎么读？

伊万斯得了风湿热，没去上课，功课也落下了。Evans had rheumatic fever, missed school and fell behind.在他求救的同时我能听到拳头落下的声音。I could hear the blows landing as he appealed for help.地上满是他刻木雕时落下的碎屑。The floor was covered with shavings from his wood car...

“落下”的英语可以翻译为：ecptoma，slump，incidence，alight，devolution ...