Get down on all fours and look around.
四肢触地，模仿狗狗的样子来观察四周。
Father got down on all fours and gave the baby a ride.
父亲怕在地上，给孩子当马骑。
Get down on all fours and look around.
她疲乏得四肢也松驰了。
These fours have their characteristics each and also work together.
四种模式各具特色又相互包容互补。
These fours have their characteristics each and also work together.
四种模式各具特色又相互包容互补。
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