使用这个标记，他已经建立了从泰国和越南的一系列树木年轮年表，以表明在十五世纪早期横贯大陆和东南亚的一段严重的干旱期。
Using it, he has built up a series of tree-ring chronologies from Thailand and Vietnam that indicate a period of severe drought across mainland South-East Asia in the early 1400s.
他们还要选择树木做上标记以进行疏伐、砍伐，负责森林保护活动，巡逻公园地区防止破坏。
They also select and mark trees for thinning or logging, manage forest protection activities and patrol park areas to prevent damage.
迹象，英里标记，树木，快速抹去我那静止的形状。
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