2. enjoy yourself 过得愉快；请自便
eg. Enjoy yourself, and nourish your sense of humour.
享受你自己，运用你的幽默感。
eg. Taking the time to enjoy yourself and have some fun with books and other people is reward in itself.
花一些时间享受人生，通过书本和其他人的交流获得乐趣这两件事本身就非常有意义。
3. on the house 免费；由店家出钱
eg. The bottled water is on the house.
补充一句，这里提供免费瓶装水。
eg. It was the publican's birthday, so all the drinks were on the house.
那天是酒店老板的生日，所以免费招待顾客喝酒。
4. right away 立刻
eg. I'll start the paperwork for your order right away .
好啊，那我立刻就为你们的订单作准备了。
