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
Your show doesn't begin until eight thirty.
你的展览八点半才开始。
It's no sin to sell dear, but a sin to give ill measure.
高价卖不为过，短斤少两才有罪。
As the play draws to its close, they wonder whether they will ever catch that last train home.
当戏快演完时，他们又为是否能赶上末班火车回家而犯愁。