annual rings

同根派生

Annual rings record a tree's age.
年轮标示树龄。
The annual rings of plants growing in temperate climates can be seen in crosssection as two consecutive rings of light and dark-colored xylem tissue.
在有显著季节性气候的地区中，不少植物的次生木质部在正常情况下，每年形成一轮（色浅层和色深层）。
Dendrochronology A method of archaeological dating by the ANNUAL RINGS of tree, used when the lifespans of living and fossil trees in an area overlap.
树木年代学：在一定的区域内当生活树木以及化石树木的寿命有重叠时，通过树木的年轮来推测考古学年代的方法。
Vol. 16 Barks &Annual rings Photographs of aged bark appearance, wooden grain, annual rings and stumps are included....Photographs of...
刚才;和刘伟副市长同乘环16路上班[原创]-大众社区-山东论坛...
Chaperonage of reply every day of annual rings, arrive great occasion of nation long leave again, consider how much time spend a way........
伴随的日日复复的年轮，又到国庆长假，考虑多少次的度过方式。。。。。。。。