1 absent-minded

2 preoccupied

3 inattentive

4 with one's thoughts wandering

1 where

2 how

1 (literary) how is one to know?

1 milk vetch

2 plant genus Astragalus

3 huangqi 黃芪|黄芪, Astragalus membranaceus (used in TCM)

1 Yanqi county in Xinjiang

1 How do you catch the tiger cub without entering the tiger's lair? (idiom); Nothing ventured, nothing gained.

1 lit. why use a pole-ax to slaughter a chicken? (idiom)

2 fig. to waste effort on a trifling matter

3 also written 殺雞焉用牛刀|杀鸡焉用牛刀[shā jī yān yòng niú dāo]

1 the old man lost his mare, but it all turned out for the best (idiom); fig. a blessing in disguise

2 it's an ill wind that blows nobody any good

1 lit. can the sparrow and swallow know the will of the great swan? (idiom); fig. how can we small fry predict the ambitions of the great?

1 to mention sth without elaborating (idiom); not giving details