Ursa
n. [天]大熊星座（等于Ursa Major）；[天]小熊星座（等于Ursa Minor）
🗣️ 情景例句
Thank you.
谢谢 。
When an opportunity is neglected,it never comes back to you.
机不可失，时不再来；机会一过，永不再来。
The implications of all this were that it was not the disturbance of sleep that mattered, but the disturbance of dreaming.
睡眠受到干忧没关系，而做梦受到干忧是有问题的。