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
The media is amazing these days, we can watch world changing events happen live right in front of our eyes.
现在媒体却实很神奇，我们能亲眼目睹世界上刚发生的事情。
I know the boy whose father is an attorney.
我知道那个男孩的父亲是律师。
This is a good photograph.Who are these people?
这是一张很好的照片。这些人是谁。