As late as 1820， the universe was thought by European scientists to be 6，000 years old. It is now thought to be between 15 billion and 20 billion years old.
直到1820年，歐洲的科學家們還認為宇宙只有6000歲。現在認為已由150到200億歲。
Up to 150 tons of meteorite fragments slam into Earth every year. As far as is known， only seven people have been struck by such rocks from space.
每年有多達150噸的隕石碎片襲擊地球，可是迄今為止已知只有7個人被這種來自太空的石頭打中。
As Apollo 11 approached the moon， the onboard computer “panicked”， repeatedly stating that it could not handle the data. The astronauts took over the landing procedure.
阿波羅11號快接近月球時，宇宙飛船上的計算機“恐慌”起來，連連表示它處理不了那些數據，宇航員們只好把著陸過程接管過來。
The Nile catfish swims upside down， and therefore has developed a light back and a dark belly， the reverse of the usual fish color scheme.
尼羅河的鲇魚在水中是反著身子游的，因此它們的背部是淺色的，而腹部卻是深色的，和一般魚的顏色布局相反。
There are earthworms as short as one-twenty-fifth of an inch and earthworms as long as 11 feet. The earthworm has no lungs； it breathes through its skin. Some earthworms have as many as ten hearts.
有的蚯蚓很短，只有1/25英寸，有的蚯蚓很長，達11英尺。蚯蚓沒有肺，通過皮膚呼吸，有的蚯蚓有多達10顆心臟。
Some insects， after their head is severed， may live for as much as a year. They react automatically to light， temperature， humidity， chemicals， and other stimuli.
有些昆蟲在頭被切下后還能活一年，并會對光線、溫度、濕度、化學品和其他刺激自動產生反應。
直到1820年，歐洲的科學家們還認為宇宙只有6000歲。現在認為已由150到200億歲。
Up to 150 tons of meteorite fragments slam into Earth every year. As far as is known， only seven people have been struck by such rocks from space.
每年有多達150噸的隕石碎片襲擊地球，可是迄今為止已知只有7個人被這種來自太空的石頭打中。
As Apollo 11 approached the moon， the onboard computer “panicked”， repeatedly stating that it could not handle the data. The astronauts took over the landing procedure.
阿波羅11號快接近月球時，宇宙飛船上的計算機“恐慌”起來，連連表示它處理不了那些數據，宇航員們只好把著陸過程接管過來。
The Nile catfish swims upside down， and therefore has developed a light back and a dark belly， the reverse of the usual fish color scheme.
尼羅河的鲇魚在水中是反著身子游的，因此它們的背部是淺色的，而腹部卻是深色的，和一般魚的顏色布局相反。
There are earthworms as short as one-twenty-fifth of an inch and earthworms as long as 11 feet. The earthworm has no lungs； it breathes through its skin. Some earthworms have as many as ten hearts.
有的蚯蚓很短，只有1/25英寸，有的蚯蚓很長，達11英尺。蚯蚓沒有肺，通過皮膚呼吸，有的蚯蚓有多達10顆心臟。
Some insects， after their head is severed， may live for as much as a year. They react automatically to light， temperature， humidity， chemicals， and other stimuli.
有些昆蟲在頭被切下后還能活一年，并會對光線、溫度、濕度、化學品和其他刺激自動產生反應。