I have to keep awake to study hard for the test tomorrow .
我必须保持清醒好为明天的考试努力用功.
Because the cave fish may not need less sleep-they may need to stay awake to forage more in an environment where food can be scarce and appear unpredictably .
因为穴居鱼类也许不需要少许睡眠-它们只有保持清醒才能够在食物稀缺、不可预料的环境中捕食更多的食物。
Pilot must be awake to the changes in the weather .
飞醒员必须警觉天气的变化。
When jawaharlal nehru made his famous speech on august 15th declaring that at the midnight hour when the world slept india would awake to life and freedom massacres were taking place almost daily on both sides of the line .
Some countries are awake to this : in britain where prices have fallen by nearly half in real terms big property groups have raised equity to shore up their balance-sheets and reduced prices are attracting foreign buyers to london
