🧩 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
The crowd flocked around the speaker.
人群聚集在演讲人四周。
We'll drink your health.
我们为您的健康干杯。
He is now satisfied merely to try to stand up, but as soon as he does so a porpoise knocks him flat.
此时的海龟，只要能站起来就满足了，但它刚站起来，就被一只海豚击倒。