1 fact

2 classifier: 个 gè

1 actually

2 in fact

3 really

1 fickle

2 multi-variate (math.)

1 strength

1 system for identifying users (on a rail network, the Internet etc)

1 nothing much changes (idiom); always the same

2 stuck in a rut

1 to show no understanding of the times (idiom); cannot adapt to current circumstances

2 not amenable to reason

1 Facts speak louder than words. (idiom)

1 unchanging since times immemorial (idiom)

2 unalterable

3 unvarying

4 monotonous

1 to put into practice

2 to carry out (idiom)