A guess is an attempt to give the right answer when you are not certain if you are correct. Guess这个字可以接介系词at，也可以不加，区别如下： 一、guess这个字加介系词at，表示猜的动作，猜想某件事物是怎样发生的，但不一定猜对，如： the suit was faultless:.
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