1.merit n.优点；功绩

This method at least had the merit of simplicity.
这种办法至少有简单明了的优点。

2.recruit v.吸收；征兵；招聘

We are having difficulties in recruiting well-qualified staff.
我们难以招募到素质好的职员。

3.undergraduate n.大学生

A few years ago, sociology is the most popular subject for undergraduate.
几年之前，社会学是大学本科生最欢迎的课程。

4.fellow n.家伙；同事；同伴

Jack is a clever fellow indeed.
杰克确实是个聪明的家伙。

5.alternative a.两者择一的；供选择的

We have the alternative plans of having a picnic or taking a boat trip.
我们在去野餐或者去乘船旅游两个计划中只能选一。