A layer of
一层…
🧩 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;
of
[əv]
prep. 关于;属于…的;由…制成;
aux. 助动词 [非标准用语、方言] =have [主用于虚拟语气];
🗣️ 情景例句
Sorry, but she is out for lunch right now.
抱歉，她现在出去吃午饭了。
A disease known is half cured.
病情确诊断，治病好一半。
His parents did not know what was wrong.
他的父母亲不知道他有什么毛病。