1、course

(尤指船或飞机的)航向，航线，路线

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。

The tug was seaward of the Hakai Passage on a course that diverged from the Calvert Island coastline.

托船驶离卡尔弗特岛海岸朝哈凯航道驶去。

行为方式;处理方式

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。

He must fall on his sword. That's the only course left open to him.

他必须面对失败，他唯有这一条路走。

进程;发展的方向

a series of decisive naval battles which altered the course of history.

改变历史进程的一系列决定性的海战

In the natural course of events cows would wish to be milked more than twice a day.

按照事情发展的自然规律，母牛每天应该挤奶两次以上。

2、vulnerable

脆弱的;易受伤害的

Old people are particularly vulnerable members of our society.

老年人是社会中尤为明显的弱势群体。

易感染（某种疾病）的；易患病的

People with high blood pressure are especially vulnerable to diabetes.

有高血压的人尤其易患糖尿病。

Plants that are growing vigorously are less likely to be vulnerable to disease.

生命力强的植物不容易得病。

易受伤害的;易受影响的

Their tanks would be vulnerable to attack from the air.

他们的坦克易受到空袭。

a table showing which cars are most vulnerable to theft.

易被盗车辆一览表