1 research

2 a study

3 classifier: 项 xiàng

4 to research

5 to look into

1 wonderful

2 marvelous

3 brilliant

1 spirit

2 mind

3 consciousness

4 thought

5 mental

6 psychological

7 essence

8 gist

9 classifier: 个 gè

1 delicate

2 fine

3 refinement

1 carefully chosen

2 handpicked

3 best of the bunch

4 choice (product)

5 concentration (mining)

6 to concentrate

7 to winnow

1 elite soldiers, ample provisions (idiom); well-prepared forces

2 preparations for war are in an advanced state

1 extensive but not refined (idiom); to know something about everything

2 jack-of-all-trades, master of none

1 mastery of study lies in diligence (idiom). You can only master a subject by assiduous study.

2 Excellence in work is only possible with diligence.

3 Practice makes perfect.

1 deep and detailed investigation (idiom)

1 to exhaust one's thoughts and ingenuity (idiom); to think sth through thoroughly

2 to rack one's brains

3 to leave no stone unturned