Everybody has blue days.These are miserable days when you feel lousy, grumpy, lonely, and utterly exhausted. Days when you feel small and insignificant,when everything seems just out of reach.You can’t rise to the occasion. Just getting started seems impossible. 其实一点小事就使你郁闷一天,情况并不总是那么糟。
lousy adj. 很糟糕的；
grumpy adj. 脾气坏的
It doesn’t take much to bring on a blue day, It’s not always such a bad thing.
In fact, it is not always lousy that only trivial things depress you all day.
像翻译时用到的usually, always 一般是放在句子中间的。