🧩 词语组成解析
[医]马鲛
sierra
[[si'erə]]
n. 呈齿状起伏的山脉
🗣️ 情景例句
That's very nice of you. Where did you get it? It's not a print.
真细心！你从哪儿弄来的？这还不是复制的呢！
He who has not tasted bitter knows not what sweet is.
不吃苦中苦，哪知甜中甜。
Yes. I have everything ready here.
是的。我把一切都准备好了。