U-packing
[机] U形皮填科
🧩 词语组成解析
packing
['pækiŋ]
n. 包装，打包;包装材料;（缝隙）填料;
v. 压紧(pack的ing形式);装满;
🗣️ 情景例句
What's up?
有什么事？
Grasp all, lose all.
贪多必失。
Once the existence of this wave-length had been discovered,
一旦这种波长的实际存在被发现，