A group of arborists, including Jake Milarch, are hoping to preserve ancient trees such as this California redwood by cloning them.
包括大卫·米拉奇在内的一群树艺家正试图通过克隆来保育加州红杉这一类的古老树种。
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Today, it is vital for urban foresters and arborists to understand and respond to differences in the participations and expectations of these diverse users.