1 two

2 2

3 (Beijing dialect) stupid

1 twenty

2 20

1 twelve

2 12

1 basic

2 fundamental

3 main

4 elementary

1 fingernail

1 don't do it, or don't rest (idiom); either give up, or go through to the end

2 Since we started, we must carry it through whatever happens.

3 in for a penny, in for a pound

1 thoroughly (idiom)

2 completely

3 one and all

4 very clean

1 one divides into two

2 to be two-sided

3 there are two sides to everything

4 to see both sb's good points and shortcomings (idiom)

1 to make a terrible scene (idiom)

2 to throw a tantrum

1 unfamiliar at first, but well accustomed soon enough (idiom)