crown thinning

基本解释

I am 54 years old and have serious thinning on the crown of my head.
我已经54岁了，并且我的头已经明显秃顶，像个皇冠！
In male-pattern hair loss, loss and thinning begin at the temples and the crown and either thins out or falls out.
雄性激素导致的脱发，首先是前额的两侧，头顶部分的头发脱落，变细，最终这两个部位的头发要么变软变细，要么就脱落光了。
Furthermore, the relationships among contribution of different layers of tree crown to light absorption, dynamic analysis of tree crown structure and thinning as well as pruning were discussed.
并就不同冠层对光吸收的贡献与树冠结构动态分析及抚育间伐修枝方面的关系进行了讨论。