Make a speciality of
专门研究…,使…成为专长
🧩 词语组成解析
make
[mek]
vt. 做，制造;生产，制定;使成为;使产生;
vi. 开始;尝试;行进;增大;
n. 制造;生产量;性格;形状，样式;
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
When did the Roman Empire come into being?
罗马帝国是什么时候形成的？
You cannot have two forenoons in the same day.
一日之中不可能有两个上午。
I insist on taking proper food for this expedition. The men often fall ill and suffer fever, so I have decided to take live animals.
我坚持认为，这次探险要携带合适的食物。水手经常生病发烧，因此我决定带活的动物。