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汉语拼音：nián lún

木本植物的主干由于季节变化生长快慢不同，在木质部的断面显出的环形纹理。年轮的总数大体相当于树的年龄。

1. 木本植物主干横断面上的同心轮纹。由于一年内季候不同，由形成层活动所增生的木质部构造亦有差别。春夏两季生长旺盛，细胞较大，木质较松；秋冬两季生长缓慢，细胞较小，木质较紧。这两层木质部形成同心轮纹，根据轮纹，可推测树木年龄，故称年轮。

   胡适 《论短篇小说》：“譬如把大树的树身锯断，懂植物学的人看了树的横截面，数了树的年轮，便可知道这树的年纪。”

• The ring near the bark is the biggest one of all.

  离树皮最近的年轮是当中最大的.

• A sixty - year - old tree has sixty rings.

  一棵60 岁 的树就有60个年轮.

• How many rings does a 4900 - year - old tree have?

  一棵4900 岁 的树会有多少个年轮 呢 ?

• The Maine woodsman sits on a stump whose rings number centuries of growth.

  缅茵州的伐木人坐在一段有数百年年轮的木桩上.

• You can tell the age of a tree by counting the rings in its wood.

  数数木头里的年轮就知道这棵树的年龄.

• These rings form an annual record of past rainfall in the Southwest.

  这些年轮就为西南地区留下了过去降雨情况的编年史.

• From the rock profile can clearly see the ring.

  从岩石的剖面可清楚地看到年轮.

• If you at a stump, you can see the layers.

  如果你观察木桩, 就能看到这些分层,它们被称为“年轮”.

• I worked with the patience of a redwood growing rings.

  我这种耐心,堪与红杉树长年轮媲美.

• Simple. We cut it down and counted the rings.

  很简单, 我们把树砍倒之后数了数年轮.

• Splinters inside the wood that are in - line with the annual rings.

  直的年轮里面的小杂点.

• Santa baby, fill my stocking with a rolex, And checks.

  圣婴儿, 将我的库存盘点装满rolex 、 和裂开年轮.

• He is in line for the presidency of the club next year.

  明年轮到他担任俱乐部主任.

• Only in the dark will ring inadvertently substituted.

  只是在不经意间暗将年轮偷换.

• The trees full of annual rings.

  记载年轮的树木.