1 pit

2 stone

3 nucleus

4 nuclear

5 to examine

6 to check

7 to verify

1 core

2 nucleus

1 walnut

2 classifier: 个 gè

3 classifier: 棵 kē

1 to toss and turn (sleeplessly)

2 again and again

1 to cover

1 total defeat of an army (idiom); fig. a complete wipeout

1 lit. the cart in front overturns, a warning to the following cart (idiom); fig. draw lesson from the failure of one's predecessor

2 learn from past mistake

3 once bitten twice shy

1 sky and the earth turning upside down (idiom); fig. complete confusion

2 everything turned on its head

1 sky and the earth turning upside down (idiom); fig. complete confusion

2 everything turned on its head

1 lit. turning his hand palm up he gathers the clouds, turning his hand palm down he turns them to rain

2 very powerful and capable (idiom)