So we go, "sit," on the couch; "sit," tummy-rub; "sit," look, I throw a tennis ball; "sit," say hello to that other dog.
比如说“坐”，（它照作了，就可以允许它）到沙发上来；“坐”，它照作了，就可以）挠挠它的肚皮；“坐”， （它照作了，就可以）让一个球给它；“坐”， （它照作了，就可以）让它跟其它狗打个招呼。