国产热热热精品,亚洲视频久久】日韩,三级婷婷在线久久,99人妻精品视频,精品九热人人肉肉在线,AV东京热一区二区,91po在线视频观看,久久激情宗合,青青草黄色手机视频

Programme Introduction 節(jié)目簡(jiǎn)介

When we talk about swans, the words which come into our mind are elegance and grace. They are a delight to see in rivers around the UK and people love their beauty.

However, some environmentalists are worried these beautiful birds are now becoming a hazard to other river inhabitants.

So what's the real story about swans and are there any solutions to this problem?

Find out more with Chen Li and Helen.

天鵝讓人聯(lián)想起高貴和優(yōu)雅，它們的出現(xiàn)對(duì)河流多加了一些色彩和美感。人們對(duì)它們非常喜愛(ài)。

可是現(xiàn)在有些環(huán)保人士擔(dān)心天鵝的飲食習(xí)慣破壞了河流的生態(tài)平衡。

這到底是怎么一回事兒呢？有沒(méi)有什么解決方式？

本期節(jié)目陳藜和 Helen 為您講解。