Packed bed
[化] 填充层
🧩 词语组成解析
packed
[pækt]
adj. 充满…的;塞满了…的;
v. 包装(pack的过去式和过去分词);
bed
[bɛd]
n. 床;苗圃;河床;（地下由黏土、岩石等构成的）地层;
vt. 把…固定在;（某人）发生性关系;给人铺床;
vi. 上床;分层;
🗣️ 情景例句
The student has a very wide range of interests.
那个学生的兴趣非常广泛。
I asked him to keep quiet, but he wouldn't.
我请他保持肃静，但是他不肯。
CUSTOMS OFFICER: Are these your cases?
这些是你们的箱子吗？