Unsaturated tree
[計] 非飽和樹
?? 詞語組成解析
a. 沒有飽和的, 不飽和的
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
Well, I have an appointment now, I'll have to go.
嗯，我還有一個約會，我得走了。
He that climbs high falls heavily.
爬得高，跌得重。
Almost any day a young porpoise may be seen trying to turn a 300-pound sea turtle over by sticking his snout under the edge of his shell and pushing up for dear life.
幾乎每天都可以看到一只小海豚把鼻子頂入一只300磅重的海龜的硬殼下面，拼命地把它翻過來。