Packing fraction
[化] 充填率
🧩 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
we need to put together volunteers
我们需要募集义工
When the police arrived, I was doing the housework.
当警察来的时候，我在做家务。
Where's Jimmy?
吉米在哪儿？