牛仔们在春天时把牛赶拢在一起，给新生下来的看犊打上印记。
Cowboys round up their cattle in the spring time to brand the new calves.
信封厂使用很多不同类型的纸张，从顶级的犊皮纸到牛皮纸。
Envelope factories use many different types of paper, from top quality vellum to craft paper.
信封厂使用很多不同类型的纸张，从顶级的犊皮纸到牛皮纸。
Envelope factories use many different types of paper, from top quality vellum to craft paper.
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