course
单词辨析：
指学习某种技能的课程，常后接介词 in/on；也指学校里的一堂课或课本中的某一课。
lessons in First Aid
急救课
Lessons start at 8 o'clock.
8点钟开始上课。
We have learned Lesson Six. Next week we'll learn Lesson Seven.
我们已经学完了第六课，下一周我们要学第七课。
'Today we'll start a new lesson,' the teacher said.
“今天我们要开始上新课。”老师说。
尤指学校的上课时间；也指某一科目的课程，常后接介词 in。
a class in dancing at the night school
夜校的舞蹈班
What time will the next class begin?
下一节课什么时候开始？
It will take some time before you can go back to your yoga class.
你得再过会儿才能回去上瑜伽课。
指有关某一学科的系列课程，常后接介词 in/on；也指大学中为修读学位或取得某种资格而学习的课程。
a three-year degree course
三年制学位课程
He is doing a one-year journalism course.
他在修读为期一年的新闻学课程。
I'm taking a course in graphic design.
我在上一门平面设计课程。
相关例句：
The oldest president in American history had stayed the course for two terms.
美国历史上的第一位总统连任两届。
'I have read about you in the newspapers of course,' Charlie said
“当然我已经在报纸上看过一些关于你的报道了，”查利说道。
Aircraft can avoid each other by going up and down, as well as by altering course to left or right
飞机可以通过上下升降和左右移动改变航线来避免相撞。
In the course of the 1930s steel production in Britain approximately doubled
在20世纪30年代，英国的钢铁产量几乎翻了一番。
The ill fated ship was sent off course into shallow waters and rammed by another vessel.
这艘倒霉的船偏离航道误入浅水区，被另外一艘船撞上了。
My best course of action was to help Gill by being loyal, loving and endlessly sympathetic
我能给吉尔的最大帮助就是对他忠诚、关爱他并且永远满怀同情之心。