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(xué)家們還認(rèn)為宇宙只有6000歲?，F(xiàn)在認(rèn)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(dá)150噸的隕石碎片襲擊地球，可是迄今為止已知只有7個(gè)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(hào)快接近月球時(shí)，宇宙飛船上的計(jì)算機(jī)“恐慌”起來，連連表示它處理不了那些數(shù)據(jù)，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(zhǎng)，達(dá)11英尺。蚯蚓沒有肺，通過皮膚呼吸，有的蚯蚓有多達(dá)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(huì)對(duì)光線、溫度、濕度、化學(xué)品和其他刺激自動(dòng)產(chǎn)生反應(yīng)。
直到1820年，歐洲的科學(xué)家們還認(rèn)為宇宙只有6000歲?，F(xiàn)在認(rèn)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(dá)150噸的隕石碎片襲擊地球，可是迄今為止已知只有7個(gè)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(hào)快接近月球時(shí)，宇宙飛船上的計(jì)算機(jī)“恐慌”起來，連連表示它處理不了那些數(shù)據(jù)，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(zhǎng)，達(dá)11英尺。蚯蚓沒有肺，通過皮膚呼吸，有的蚯蚓有多達(dá)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(huì)對(duì)光線、溫度、濕度、化學(xué)品和其他刺激自動(dòng)產(chǎn)生反應(yīng)。