Dogs, for example, will wag their tails, get down their front legs, and stick their behinds in the air to indicate "what follows is just for play".
例如,狗会摇尾巴,放下前腿,把屁股翘在空中,表示“以下的动作只是为了好玩”。
If you want to play an instrument well, you've got to stick at it.
要想练好一种乐器,你必须持之以恒。
One young male chimp was seen using a stick to play "airplane," resting on his back and holding the stick up with his hands and feet, the way that many parents play with their young children.
他们也看到一只雄性猩猩用树枝来玩“机场”的游戏,他把树枝放在背上,手上和脚上,像许多猩猩父母们与孩子玩耍时一样。
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