If you don't know the answer, just take a guess.
如果你不知道答案，就猜猜看吧。
That was a lucky guess on the math test!
數學考試那題真是猜得太幸運了！
You have three guesses to find out what is in the box.
你有三次猜測的機會來找出盒子裡裝什麼。
My guess is that it will rain this afternoon.
我猜今天下午會下雨。