Seal casing
[化] 密封壳体
🧩 词语组成解析
seal
[sil]
n. 密封;印章;海豹;封条;
v. 密封;盖章;决定;封上（信封）;
casing
[['keisiŋ]]
n. 箱, 盒, 包装, 框, 套管\\n[化] 汽车外胎
🗣️ 情景例句
I have been a poor student of foreign languages.
外语就学得不好。
Happy birthday!
祝贺您生日快乐！
There are some changes the still have to be made.
有些地方还得修订。