not thinking straight 大腦不清醒
例:Don't drive your car now ,because you've had too much to drink and you're not thinking straight.
千萬別開車,因為你喝了太多的酒頭腦不清醒.
例:A: Why is Bob wearing a T-shirt in the middle of January?
為什么Bob在一月中旬穿一件T恤衫.
B: I don't know. Maybe because he's not thinking straight.
我不知道,也許因為他的頭腦不清醒.