Concave tree of region
[计] 区域凹树
🧩 词语组成解析
concave
['kɔn'keiv]
n. 凹面，成凹形;
adj. 凹的;
vt. 使成凹形;
tree
[tri]
n. 树;木料;树状图;宗谱;
vt. 把…赶上树;使处于困境;把鞋型插入（鞋内）;
of
[əv]
prep. 关于;属于…的;由…制成;
aux. 助动词 [非标准用语、方言] =have [主用于虚拟语气];
🗣️ 情景例句
And a full night.
还有一整夜。
He has pamphlet.
他有一本小册子。
All right.If we win a lot of money We'll travel round the world and we'll stay at the best hotels.
好吧。要是我们赢了很多钱，我们就去周游世界，并且往最好的旅馆。