A horizon
A层（腐殖堆积层, 等于淋溶层）
🧩 词语组成解析
horizon
[hə'raɪzn]
n. 地平线;范围;界限;眼界;
🗣️ 情景例句
Our teacher drills us in English.
我们老师让我们反复操练英语。
Yes, I've just come back from Scotland.
是的，我刚从苏格兰回来。
This time it was the postman and he wanted me to sign for a registered letter!
这次是邮递员，他要我签收一封挂号信！