Boundary layer
[计] 边界层\\n[化] 边界层
🧩 词语组成解析
layer
['leiə]
n. 层，层次;膜;[植]压条;放置者，计划者;
vt. 把…分层堆放;借助压条法;生根繁殖;将（头发）剪成不同层次;
vi. 形成或分成层次;[植]通过压条法而生根;
🗣️ 情景例句
Hot dogs and mustard.
热狗和芥末。
Did you phone him yourself?
你自己亲自打电话给他吗？
I can't see. I think they're in her pencil-box.
我看不到。我想大概在她的铅笔盒里。