be an unknown quantity

To be unpredictable and thus difficult to anticipate. We're still revising our new product, so its potential success is an unknown quantity as yet. This is her first year teaching, so her ability to connect with her students is still something of an unknown quantity.

词组	be an unknown quantity
释义	be an unknown quantity be an unknown quantity To be unpredictable and thus difficult to anticipate. We're still revising our new product, so its potential success is an unknown quantity as yet. This is her first year teaching, so her ability to connect with her students is still something of an unknown quantity. See also: quantity, unknown Farlex Dictionary of Idioms. See also: an unknown quantity quantity unknown unknown quantity joker the joker in the pack back to the drawing board wait for (one's) ship to come in wait for (one's) boat to come in have (got) (one's) number
随便看	thirty-something this this and that this a-way and that a-way this-a-way and that-a-way This doesn't quite suit me this (had) better be good this here take (one) down a notch (or two) take (one) down a peg (or two) take (one) down memory lane take (one) down to size take (one) for a fool take (one) for an idiot take (one) for a ride take (one) for a sleigh ride take (one) for dead take (one) for (something) take one for the team take (one) in tow take one look (at someone or something) take (one) off guard take (one) out of (oneself) take (one) out to dinner take (one) round