Speed was a variable in the experiment.

在该实验中速度是个变数。

The project is in the melting pot at the moment, so we’d better wait for a while before we make any decisions.

这项计划此时还有很多变数，我们最好静观其变，然后再作决定。

The best traders don't try to hide from these unknown variables by pretending they don't exist, nor do they try to intellectualize or rationalize them away through market analysis.

最优秀的交易者不会通过装不知道来隐藏这些未知的变数，他们也不会通过市场分析把这些变数合理化。