回顾过去：回顾或反思过去的经历、事件或决策。
look towards one's back
同义词： look back
(look backward)尝试所有匹配可能，所以在最差的情况下会呈指数级时间复杂度。工程上为了优化解析的效率，引入了
Sometimes the best way to go forward is to look backward.
有的时候回顾是最好的前瞻。
Thus he could look backward and forward at the same time.
他一直可以向前看，也同时向后看。
A holiday gives one a chance to look backward and forward, to rest oneself by an inner compass.
假期使你有机会反省与前瞻，用心中罗盘重新定好方位。
In the next months, Italy will not look backward or inwards.
Yet companies rarely use analytics to plan for the future, as good as they may be at using its data to look backward to identify trends.
Now that Saddam Hussein has once again turned his pathetically impoverished country into a kitchen for poisons and a stage for his grandiosity, it is time to look backward and up.