Slightly means to some degree but not to a very large degree.
very , a lot
His family then moved to a slightly larger house.
他全家后来搬到了一个稍微大一点的房子里。
Each person learns in a slightly different way.
每个人学习的方式都略有不同。
The temperature is slightly above freezing.
温度稍高于结冰点。
Oil prices rose slightly.
石油价格略微上升。
Someone who is slightly built has a fairly thin and delicate looking body.
a slightly built man.
一个身材瘦小的男人。