Scientists have been fascinated by these frigid places in the universe, including the Boomerang Nebula. The Boomerang Nebula, a young planetary nebula, was first named as the coldest place in the universe in 1995, a finding that was confirmed in 2013.科学家们一直对宇宙中这些寒冷的地方着迷，包括...
been losing as much as one-thousandth of a solar mass of material per year for 1500 years. This is 10-100 times more than in other similar objects. The rapid expansion of the nebula has enabled it to become the coldest known region in the Universe. The image was exposed for 1000 ...
(70%) is in a frozen state, of course. 98% of the surface is covered permanently in the ice cap. On average it is two kilometers thick, but in some places it reaches a depth of five kilometers. Strong winds driven by gravity blow from the pole to the coastline, while other winds...
There are whales(鲸) swimmingin the ocean. You can also watch penguins(企鹅) jumping into the water from icebergs(冰山). It's one of the last untouched places on the planet.It's possible to visit Antarctica by plane but most people go there by ship. That'sbecause the ships are comfort...
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There are whales swimming in the ocean. You can also watch penguins jumping into water from icebergs(冰山). It's one of the last untouched places on the planet. It's possible to visit Antarctica by plane, but most people go there by ship. That's because the ships are comfortable places...
Visually Dome A looks like most other places in Antarctica – an endless, flat, lifeless plain. The landscape consists of white snow and the sky above it. Dome A is the highest part of the Eastern Antarctic ice shield. The ice near it is at least 2,400 m thick and below the Dome, ...
vaccineforeach of the ninespecified target groups under the 2010-2011 GVP, the Childhood Influenza Vaccination Subsidy Scheme and the Elderly Vaccination Subsidy Scheme, as well as a comparison of the situation of severe influenza cases in Hong Kong with that of the...
The word “sharp” can be __ to describe many different things in your home, classroom, and places of work. In this chapter, the writer __sharp pencils, meaning pencils with a very fine __.The writer does not like dull pencils. 。
There are still some faraway places in the world where you might find a public scribe to do your business or social writing for you, for money. There are a few managers who are lucky enough to have the service of that rare kind of secretary who can take care of all sorts of letter ...