look out for：搜寻（某人或某物）， 试图得到（某物）； 留神提防。
例句：I felt that I had to look out for myself, because I didn't see that anyone else was going to.
我觉得必须为自己考虑一下了，因为我看不出还有谁会替我考虑。
look out of：向外看
例句：She swivelled round to look out of the window.
她转过身去望窗外.
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