Seif dune
赛夫沙丘，蛇形砂丘
🧩 词语组成解析
赛夫沙丘(顺着风向的长沙丘)
dune
[dju:n]
n. （由风吹积成的）沙丘;
🗣️ 情景例句
We'll talk about it out there.
我们到外头谈。
Yes. Please do.
好，请说。
of the nature of the illness from which his friend was suffering,
不知道他的朋友得的是什么病，