at a guess
1. 凭猜测
At a guess I should say we are speeding at fifty miles an hour.
我猜测我们正以每小时五十公里的速度在前进。
by guess
1. 凭猜测
Don't answer by guess.
别瞎猜答案。
it's anybody's guess
1. 谁也不确定
It's anybody's guess who actually killed him.
大家都不确定是谁杀了他。
习惯用语anybody's guess1.[口]谁也猜不准的事at a guess (=by guess)1.凭推测; 凭估计by guess and by God1.凭瞎猜; 凭粗略估计; [海俚](船只没有陆标导航)盲目地(驾驶)by guess and by gosh1.凭瞎猜; 凭粗略估计; [海俚](船只没有陆标导航)盲目地(驾驶)have another guess coming1.[口]猜错了, 想错了It is anyone's guess.1.[美口]这是谁都说不准的事。keep sb. guessing1.不明说, 让人猜miss one's guess1.推测错, 猜错, 想错My guess is that...1.我认为....One man's guess is as good as another's.1.无论谁的猜测都是一样(猜测总归是猜测)。wild guess1.乱猜, 瞎猜