Since the new tree was unable to reproduce naturally, caretakers amputated some of its limbs and grafted them onto other citrus trees to produce more of the desirable fruit.
不过问题是它们没法自然繁殖，于是有心人就截取了部分枝条嫁接到其他橙树上，希望生产出更多美味水果。
They are expensive to produce but cheap to reproduce and distribute, and therefore exhibit strong economies of scale with incentives to an over-supply.
它们的生产成本高昂，但再生产和销售的成本低廉，因而展现出强大的规模经济效益，并容易诱发供应过量。
To reproduce, the virus invades a cell in a host and USES the cell to produce more of itself.
病毒通过攻击宿主细胞繁殖，病毒利用宿主细胞来进行复制。
Viruses only contain a shell of protein and some DNA and RNA genetic makeup materials. To reproduce, the virus invades a cell in a host and USES the cell to produce more of itself.
病毒只有一个蛋白质外壳和一些DNA和RNA这样的遗传物质，通过侵入宿主细胞并利用宿主细胞来进行复制。
Viruses only contain a shell of protein and some DNA and RNA genetic makeup materials. To reproduce, the virus invades a cell in a host and USES the cell to produce more of itself.
病毒只有一个蛋白质外壳和一些DNA和RNA这样的遗传物质，通过侵入宿主细胞并利用宿主细胞来进行复制。
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