彻夜: all night; all through the night; throughout the night 短语和例子彻夜不眠 lie awake all night; sit up all night; keep vigil all night; pass a sleepless night; stay up the whole night; 彻夜未寐 have one
寐: 动词[书面语] (睡) sleep : 假寐 take a nap; 失寐 insomnia; unable to sleep; 梦寐以求 long [yearn] for sth. day and night
