Reachability tree
[计] 可达树
🧩 词语组成解析
[计] 可达性\\n[化] 可达性; 能达性
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）;
🗣️ 情景例句
Are you being waited on?
您需要服务吗？
To have a nice dream
做了个好梦
Sending a fax is more expensive than posting a letter, but much quicker.
发传真比寄信要贵些，但是要快得多。