Point of departure
出国 Abroadn. 开航点，出发点
🧩 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
I have worked hard at my major subject.
我对主修课特别用功。
I dialed the right number,but nobody answered.
我拨了正确的号码，但是任何人接。
By the way, before leaving this subject, I would like to add a few comments.
在结束这个问题之前顺便一提，我希望能再提出一些看法。