1.   It is thought that the very first placental mammals were tiny insectivores, but no fossil evidence of them remains.

2.   The very first mammals were small insectivores, probably very similar to this modern tree shrew.

3.   Dolly was the first mammal created from a single cell of an adult through cloning.

4.   Dolly, the first mammal created by cloning, gave birth to triplets last week.

5.   Dolly, the first mammal to be cloned from an adult, was the only success out of many attempts.

6.   His first mammals were Vietnamese pond deer.

7.   In addition, Scotland-based cloning pioneer Ian Wilmut, whose work produced Dolly, the first cloned mammal, also has applied for a license.

8.   In January, she became the first marine mammal ever to be equipped with a satellite tracking device that could transmit data directly onto the Internet.

9.   It is barely a year since the birth of Dolly the lamb, the first mammal cloned from a single cell of an adult individual.

10.   Scientists at the Roslin Institute near Edinburgh, Scotland, who produced the first cloned mammal, Dolly the sheep, were also puzzled by the announcement.

a. + mammal >>共 161
marine 24.32%
small 9.73%
large 6.13%
first 4.68%
adult 2.52%
only 1.44%
rare 1.44%
huge 1.44%
endangered 1.26%
flying 1.26%
first + n. >>共 866
time 17.03%
half 3.66%
round 3.47%
day 2.41%
step 2.05%
game 1.75%
quarter 1.68%
year 1.32%
inning 1.07%
meeting 1.03%
mammal 0.01%
每页显示:    共 26