生活英语口语:How's your course going? 课上得怎么样?

specialize:to become an expert in a particular area of work, study or business; to spend more time on one area of work, etc. than on others 专门研究（或从事）;专攻 verb
He specialized in criminal law.
他专攻刑法。
Many students prefer not to specialize too soon.
很多学生不愿过早地确定专业。
The shop specializes in hand-made chocolates.
这家商店专营手工制作的巧克力。

amazing:very surprising, especially in a way that makes you feel pleasure or admiration 令人大为惊奇的；（尤指）令人惊喜（或惊羡、惊叹）的
an amazing achievement/discovery/success/performance
惊人的成就／发现／成功／表演
That's amazing, isn't it?
真是令人惊叹，是不是？
It's amazing how quickly people adapt.
人适应环境的速度之快真是惊人.