Duration of validity
[化] 有效时间
🧩 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
Then three it will be.
好 ，就三杓。
He that climbs high falls heavily.
爬得高，跌得重。
Two days alter, Louis Bleriot arrived near Calais with a plane called 'No.XI'.
两天之后，路易斯。布莱里奥驾驶一名为“11号”的飞机来到加来附近。