ph.

1. He fell on all fours.
他跌得趴在地上。

2. The examples are not on all fours.
这些例子并不完全一致。

1. 匍匐,趴着：31.be accustomed to 习惯于...... | 32.on all fours 匍匐,趴着 | 33.come to a decision 决定下来

2. 完全一致：on all accounts 无论如何 | on all fours 完全一致 | on all sides 在各方面

3. 匍匐着,爬着：17. in twos and threes零零星星,三三两两 | 18. on all fours匍匐着,爬着 | 19. all in one合在一起的

4. 匍匐着：13. number one's days/ one's days are numbered活不久了. | 2. on all fours匍匐着. | 3. On earth peace, good will toward men.大地平安,与人为善.

adv

1. on hands and knees

e.g. he got down on all fours to play with his grandson