BOB:A healthy diet is very important. But eating healthily is sometimes a real challenge. I mean, I love to eat! And I love to cook all my favorite delicious meals. But from now on I'm going to make more healthy dinners.

BOB:We're going to eat light foods instead. Like chicken or fish for dinner, with vegetables like broccoli or spinach. It's very important to cook your own food if you want to lose weight.

NANCY:You want a biscuit?

BOB:No thank you dear. In fact, I'm going to have a banana. Did you know that the humble banana contains the vitamins A, B and C? 香蕉还富含钾，有助于平衡体液、调节血压。 A banana a day keeps the doctor away.

BOB:They help keep you more alert and more relaxed. Who would have thought it, eh? All these beneficial effects from just one banana?

NANCY:How interesting. My goodness is that the time?