重点讲解：
1. right now 现在；此时此刻；
例句：You might as well tell him right now.
你不妨现在就告诉他。
2. less than （用在数字或数量前）少于，低于，比…少；
例句：In less than seven days the infested plants had recovered.
不到7天时间，受虫害侵袭的植物就复原了。
3. be into sth. 对…很感兴趣；极喜欢；
例句：All my buddies who are into reggae wear colorful hats and have long hair.
我所有喜欢雷鬼音乐的伙伴都带着颜色鲜艳的帽子，留着长头发。
4. build up （使）积聚；（使）逐渐增加；
例句：We can build up the speed gradually and safely.
我们可以逐渐稳妥地提高速度。
5. a couple of 两个；几个；
例句：I'll be back in a couple of days.
我过几天就回来。
