文字稿
（关于台词的备注: 请注意这不是广播节目的逐字稿件。本文稿可能没有体现录制、编辑过程中对节目做出的改变。）
企鹅只能品尝到食物的酸味和咸味。一项基因研究显示,不会飞的鸟类进化过程中早就失去了大部分的味觉。以下是BBC 记者Helen Briggs 发回的报道：
With their waddling gait and lack of flight, penguins have long been an oddity in the bird kingdom. Now zoologists have discovered they’re unusual too in their sense of taste.
Most birds can’t detect sweet things. But penguins have also lost the taste for bitter and umami, or meaty flavours. Scientists think fish would taste of little but salt to a penguin. And because they swallow fish whole they may not be able to discern flavours at all.
They say the puzzle could be explained by the penguins’ evolution in the extreme cold of Antarctica.
测验
请听报道并回答下列问题。
1. What flavour can’t be tasted by most birds?
2. How many flavours have penguins lost over time?
3. What do scientists say fish might taste like to a penguin?
4. True or false? Scientists believe the development of penguins’ sense of taste has been affected by the weather.
词汇表
waddling (身体)摇摇摆摆的
gait 步态
lack 缺少
flight 飞翔的能力
oddity 奇特（现象）
bird kingdom 鸟王国
zoologists 动物学家
detect 尝到
bitter 苦味
umami 鲜味
meaty 肉味
whole 整个的，（指整条鱼被吞下）
discern 辨别
puzzle 谜，难题
evolution 进化
extreme 极端的
答案
1. What flavour can’t be tasted by most birds? Most birds can’t taste sweet things.
2. How many flavours have penguins lost over time? Three. They have lost the ability to taste sweet, bitter and meaty flavours.
3. What do scientists say fish might taste like to a penguin? They say fish would taste mainly of salt to a penguin.
4. True or false? Scientists believe the development of penguins’ sense of taste has been affected by the weather. True. They say penguins’ evolution could be affected by the extreme cold in Antarctica.