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Sometimes , bluebirds can 't find birdhouses .

但有时蓝知更鸟找不到这种鸟巢，

A project might include planting native seed-bearing plants in parks and lanes , or building birdhouses designed to attract a particular species .

一个项目可能包括在公园和街区种植乡土植物，或设置人工鸟屋以吸引某一特定鸟类。

Because your friend gina is more productive at printing t-shirts and building birdhouses compared to mike , she has an absolute advantage in both printing t-shirts and building birdhouses .

因为你的朋友吉娜与迈克相比，在印制t恤和建造鸟窝方面更高效，所以她在印制t恤和建造鸟窝方面都有绝对优势。