1 surname Shuang

1 Gemini (star sign)

1 derailment (railway accident)

2 to leave the rails

3 fig. to overstep bounds

4 fig. to have an extramarital affair

1 the right track

1 incomparable

2 matchless

3 unique

1 lit. one arrow, two golden eagles (idiom)

2 to kill two birds with one stone

1 both fame and fortune (idiom)

2 both virtue and reward

1 peerless

2 second to none (idiom)

1 talented and good-looking (idiom)

1 well versed in letters and military technology (idiom); fine scholar and soldier

2 master of pen and sword