Okay. So for 150 years

好的一百五十年来
organic chemistry courses have tended to acquire a daunting reputation.

有机化学课程似乎令人闻之却步
So you need help.

因此你需要帮助
I know you're very able, but trust me,

我知道你们能力很好但请相信我
you need help.

你们需要帮助
So where do you get the help?

从哪里可以得到帮助
The PowerPoints are available on the Web.

在网站上可看到幻灯片
How many of you've already seen the PowerPoint for today,

有多少人已经看过这节课的幻灯片