F layer
[电] F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
She tore up all the letters he had sent her.
她把他写来的信全撕了。
Rome was not built in a (or one) day.
罗马不是一日建成的。
I cannot express how glad I am to hear from him.
我无法表达我接到他的信时有多高兴。