* course 1
n. 过程，时期
During the course of our conversation, it emerged that Bob had been in prison.
我们在谈话过程中得知鲍勃坐过牢。
* course 2
n. 课程
a course on architecture
建筑学课程
* course 3
n. 〔船或飞机的〕航向
The plane changed course to avoid the storm.
n. 〔船或飞机的〕航向
on/off course
航向正确/偏离航向
The ship was blown off course.
这艘船被风吹离了航道。
* intercourse
n. 性交；交流，沟通
occur
v. 发生
A third of accidental deaths occur in the home.
有三分之一的意外死亡事件发生在家里。
The explosion occurred at 5.30 a. m.
爆炸发生在清晨 5 点 30 分。
* occurrence
n. 发生的事，事件
frequent/rare/common occurrence
频繁的/罕见的/常见的事情
Laughter was a rare occurrence in his classroom.
他的课堂上难得有笑声。

* current 1
n. 气流，电流，水流
currents of warm air rising from the plain
平原上升起的暖气流
an electrical current
一股电流
* current 2
a. 现行的，当前的，现时的
the current President
现任总统
* currency
n. 通货，货币
* concur 1
v. 〔与某人〕意见一致，同意
She has expressed her opposition to the plan, and I fully concur (with her) (in this matter) .
她对计划表示反对，（在这一问题上）我完全同意（她的意见）.
* concur 2
v. 同时发生
Everything concurred to produce the desired effect.
所有事情同时发生，产生了预期的效果。
* concurrent
a. 同时存在的，同时发生的
developments concurrent with this
与此同时发生的事物。
* corridor
n. 通道，走廊
We had to wait outside in the corridor until our names were called.
我们只好在外面的走廊上等候叫我们的名字。
* curriculum
n. 课程
Languages are an essential part of the school curriculum.
语言是学校课程中必不可少的部分。
* excursion
n.〔尤指集体度假时的〕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；带来
incur debts, great expense, sb's anger
负上债、须付巨额费用、惹某人生气。
* recur
v.〔尤指坏事或令人不快的事〕再次发生
Our first meeting often recurs to me/my mind.
我们初次见面的情形时常浮现于我的脑海。