The group's focus is on coastal and giant sequoias.
该组织目前的研究重点是海岸红杉和巨杉。
Giant sequoias are unimpressed by your puny human lifespan.
与巨型红杉800至1300年的生命跨度相比，人的寿命极其微不足道。
The giant sequoias, which the project also seeks to clone, are native to the western Sierra Nevada.
该项目试图克隆的巨杉生长在内华达山脉西部。
Such "fire scars" in long-lived species like giant sequoias allow him to estimate the past frequency of forest fires.
这些在长寿物种，如巨红杉中留下的火灾印迹，使得他能够估计过去森林火灾的频次。
The new research extends Swetnam's previous tree-ring fire history for giant sequoias another 1, 000 years into the past.
这项新研究将史威特南之前有关巨型水杉年轮记录火灾历史的研究再次向前推进了1000年。
Werner used small cuttings of sprouts and other plant material, including some cuttings from the upper reaches of giant sequoias.
就红杉来说，沃纳先生使用一截一截的树芽和其它植物材料，包括从巨杉顶部截下来的一些木块。
In the case of the redwoods, Mr. Werner used small cuttings of sprouts and other plant material, including some cuttings from the upper reaches of giant sequoias.
就红杉来说，沃纳先生使用一截一截的树芽和其它植物材料，包括从巨杉顶部截下来的一些木块。
However, ancient giant sequoias can have trunks that are 30 feet in diameter — far too big to be sampled using even the longest coring tools, which are only three feet long.
然而，古代巨型水杉木的树身可以长到直径30英尺——即使最长的年轮取芯工具(长度只有3英尺)也无法顺利取样。
However, ancient giant sequoias can have trunks that are 30 feet in diameter — far too big to be sampled using even the longest coring tools, which are only three feet long.
然而，古代巨型水杉木的树身可以长到直径30英尺——即使最长的年轮取芯工具(长度只有3英尺)也无法顺利取样。
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