吊兰具有繁殖快的特点，夏天气候适宜，所以吊兰长得比较快，有时候需要换盆，那么开发者_如何学Python吊兰夏天可以换盆吗？
I have Order and Shipment model. Shipment has a foreign key to Order. class Order(...): ... class Shipment()
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