Doppler's phenomenon
[医] 多普勒氏现象(物理)
🧩 词语组成解析
🗣️ 情景例句
Advice doesn't normally come cheap, but this piece is for free...
通常来说，忠告都是价值不菲的，但这个是免费赠送的。。。
A good friend is my nearest relation.
良友如近亲。
It's here. Can you see an orange?
在这儿。你能看见一只橘子吗？