请求帮助??

To the best of their ability, colonial artisans tried to keep their shops as efficient as possible and to regularize their schedules and methods of production for the best return on their investment in time, tools, and materials, While it is pleasant to imagine a woodworker, for example, carefully matching lumber, joining a chest together without resort to nails or glue, and applying all thought and energy to carving beautiful designs on the finished piece, the time required was not justified unless the customer was willing to pay extra for the quality—and few in rural areas were, Artisans, therefore, often found it necessary to employ as many shortcuts and economics as possible while still producing satisfactory products.


帮我分清这句话的结构什么的啊,这是一句话?