最新关注

Scientists discover Earth has two cores1

科学家发现地球有两个核心

We know little about the centre of Earth. People normally believe it hadjust one core. Recently， a scientist believe there may be a second coreaccording to data from a 560-km-deep earthquake.

我们对地球中心知之甚少。人们通常认为它只有一个核心。近来，一位科学家根据一次560 公里深的地震的数据认为（地球）可能还有第二个核心。

Air pollution is making human bones more brittle2

空气污染使人体骨骼更加脆弱

A new study has found a relation between air pollution and bone loss. There arethings people can do. These include driving less， using public transportation， bikingor walking whenever possible.

一项新的研究发现，空气污染与骨质流失之间存在联系。人们可以做一些事情（来减少空气污染），包括减少开车，尽可能使用公共交通、骑自行车或步行。

Officials3 get involved4 personally in promoting5 hometown

官员亲自参与宣传家乡

Recently， many government officials across the country have put themselvesinto videos promoting local culture and places of interest. The videos online havedrawn lot of attention.

最近，全国各地的许多政府官员都把自己放进了宣传当地文化和名胜古迹的视频中。这些网络视频引起了大量关注。

Notes

1. core 核心

2. brittle 易碎的；脆的

3. official 官员

4. involve 牵涉；涉及；使……参加

5. promote 促销；推广