Apex of tree
[計] 樹形頂點
?? 詞語組成解析
apex
['ep?ks]
n. 頂;<喻>頂峰;<美><礦>脈尖;尖端;
of
[?v]
prep. 關于;屬于…的;由…制成;
aux. 助動詞 [非標準用語、方言] =have [主用于虛擬語氣];
tree
[tri]
n. 樹;木料;樹狀圖;宗譜;
vt. 把…趕上樹;使處于困境;把鞋型插入（鞋內）;
??? 情景例句
Out with it!
說出來吧！
There are more foolish buyers than foolish sellers.
愚蠢的買主多魚愚蠢的賣主。
The spheres had been magnetized and attracted or repelled each other all the time.
金屬球經過磁化，互相之間不停地相互吸引或相互排斥。