Duration of prescription
[经] 命令(指示,规定,法令)有效期间
🧩 词语组成解析
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
in a horse and carriage.
坐马车。
Books,like friends,should be few and well chosen.
书籍如朋友，宜少宜精选。
Because it's winter now. The weather here is very cold in winter, isn't it?
因为现在是冬天。这儿的冬天天气非常冷，对吗？