step:看单词
: n, f' S2 E$ y0 M1 y9 ?# ]step:看老友记嘿嘿
% V9 C1 {" m, H& E3 u! fstep:听写&跟读模仿
6 N6 z) u% i' s; }7 `$ i+ U3 n' Q: k8 B
第九篇(animals commnication)
6 d( F! z9 x. r
l9 Y. ^5 B/ C
For the next couple of weeks we'll
be focus
ing on how animals communication with each other. Up to now, we're had a rather
narrow view of vocal
warnings that animals give each other. Some recent reseach indicate
s that this communication is a lot more complex than we've traditionally thought. Let me give you an example . Take
prairie (大草原

) dogs. Of course, they're not really dogs at all. but wild
rodents(@齿动物) who live on the pla
ins in the western part of the Unitd States. In case you can't visuali
ze them, let me descr
ibe them to you. They're about as big as squ
irrels, but without the bush
y tail. And unlikes squirrels, They live in holes in the ground, and they spend a lot of time just outside their holes, because they have a lot of enemies:hawks,
coyotes(一种产于北美大草原的小狼,山狗),humans, you name it. When they spot a
potential threat, they b
ark to warn their neighbor and then escape down into their holes. "Big deal," you say: well, it turns out, they can different
iate among p
red
ators. Researchers discovered that the bark differs for different predators: coyote warnings are different from people warnings, for instance. But it goes deep
er than that: there actually
evidence that the barks differentiate between individu
al perdators of the same
species. The researchers found, for example, that the prairie dogs had a different bark for each member of the research team.
4 ]; t5 |# i5 l- t' \8 ~4 p9 P6 g' Z( n" L; [. Q, p! l
今天时间不够了
, h- X8 j: g" h7 `3 @明天有时间再标记我的错误
' Y5 y: k- S9 {& v) I# ]' p/ ~
2 f( ~; l* I" _
[
本帖最后由 lora 于 2008-6-5 19:21 编辑 ]