Dogs wag their tails when they are pleased.

狗一高兴就摇尾巴。

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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”。

youdao

Dogs almost never wag their tails when alone.

当狗狗独自一个待着时，几乎是不摇尾巴的。

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Until regulators agree on a common set of sufficiently high standards banks will seek cover under the thinnest regulatory blanket and lobby to make sure their tails wag the regulatory dogs.

FORBES: Regulatory Roulette: A Dangerous Loophole In The New Capital Requirement Rules