Key:He build a hut out of driftwood. He built a model ship out of wood. 他用木头造了个模型船。 Birds build nests out of sticks to hold their eggs and baby birds. 鸟用树枝建造巢穴来给他们的蛋和小鸟安家. build on/upon 把…建立于…;以…为基础 Our relationship is built on trust. build up 增进,加强 The museum has built up a fine art collection.