* course 1
n. 過程，時期
During the course of our conversation, it emerged that Bob had been in prison.
我們在談話過程中得知鮑勃坐過牢。
* course 2
n. 課程
a course on architecture
建筑學課程
* course 3
n. 〔船或飛機的〕航向
The plane changed course to avoid the storm.
n. 〔船或飛機的〕航向
on/off course
航向正確/偏離航向
The ship was blown off course.
這艘船被風吹離了航道。
* intercourse
n. 性交；交流，溝通
occur
v. 發生
A third of accidental deaths occur in the home.
有三分之一的意外死亡事件發生在家里。
The explosion occurred at 5.30 a. m.
爆炸發生在清晨 5 點 30 分。
* occurrence
n. 發生的事，事件
frequent/rare/common occurrence
頻繁的/罕見的/常見的事情
Laughter was a rare occurrence in his classroom.
他的課堂上難得有笑聲。

* current 1
n. 氣流，電流，水流
currents of warm air rising from the plain
平原上升起的暖氣流
an electrical current
一股電流
* current 2
a. 現行的，當前的，現時的
the current President
現任總統
* currency
n. 通貨，貨幣
* concur 1
v. 〔與某人〕意見一致，同意
She has expressed her opposition to the plan, and I fully concur (with her) (in this matter) .
她對計劃表示反對，（在這一問題上）我完全同意（她的意見）.
* concur 2
v. 同時發生
Everything concurred to produce the desired effect.
所有事情同時發生，產生了預期的效果。
* concurrent
a. 同時存在的，同時發生的
developments concurrent with this
與此同時發生的事物。
* corridor
n. 通道，走廊
We had to wait outside in the corridor until our names were called.
我們只好在外面的走廊上等候叫我們的名字。
* curriculum
n. 課程
Languages are an essential part of the school curriculum.
語言是學校課程中必不可少的部分。
* excursion
n.〔尤指集體度假時的〕短途旅行
go on/make a day excursion to the mountains
到山上游玩一天
* incur
v. 遭受；蒙受；招致；引起；帶來
incur debts, great expense, sb's anger
負上債、須付巨額費用、惹某人生氣。
* recur
v.〔尤指壞事或令人不快的事〕再次發生
Our first meeting often recurs to me/my mind.
我們初次見面的情形時常浮現于我的腦海。