Term of validity
[化] 有效期间\\n[经] 有效期限
🧩 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
The traffic's bumper to bumper, it must be rush hour.
车一辆接着一辆，现在肯定是交通高峰期。
The data confirm that this product is safe and effective.
数据证实此种产品安全有效。
But there was something wrong with the child.
但是，这孩子有点毛病。