Speaking of
辅助 Assistant[引入最近谈到过的一个话题]谈起，提到
🧩 词语组成解析
speaking
['spi:kiŋ]
n. 说话;讲话;谈话;演讲;
adj. 演讲的;富于表情的;（肖像）栩栩如生的;雄辩的;
v. 讲，谈(speak的现在分词 );
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
Our products are of good quality and at a reasonable wholesale price.
我们的产品质量好，而且批发价很合理。
When the heart is afire, some sparks will fly out at the mouth.
心中发火，口吐妄言。
Sometimes ago, the United States Navy, for instance,
例如，美国海军前些时候