TPO24 6.16
Both of the author and the lecturer discuss the appearance of organic tissues in the leg bone fossil of T. rex. The writer gives three possible identifications
to support the opinion that organic tissues do exist.
The speaker casts doubts on (casts doubt on 查了下有道词典和谷歌学者,感觉还是用doubt比较多)that statement and believes that they are skeptical.
First, the professor insists that the soft substance is not necessarily the
residence remains of blood vessels. It could be something else
, he states, when bacteria colonies hollows, empty area like bones, left by the dead tissues, they often leave behind trace
s of organic material. Therefore, the soft substances tested in the leg bone fossil might just be soft moisture residues of bacteria. And this
directly disproves its counterpart in the reading material.
Moreover, the speaker contends that spheres origin from the red blood cells
is not exact. Because reddish spheres were found in other animals' tissues around the same time, which contain
s within the primitive animals that do not have red blood cells. If there is no red blood cells, spheres cannot be examined either.
A different origin might be a good explanation-they are just reddish mineral.
Accordingly, this is another place where experiences contradicted theory.
At last, the lecturer asserts that no collagen can be found in the tissue older than 100 000 years old, which means the finding in a 70- million- year -old T. rex fossil contradicts
with (及物动词)the idea about how long collagen can last. It does not come from T. rex, says the professor, it
probably comes from a
much more recent
resources like human skin of a researcher who was handling the bone,
which strengthens the opinion raised by the lecturer. Consequently, the last evidence is also
rebutted.
In conclusion, the professor clearly identifies the weakness in the passage and
convincingly shows that the arguments in the reading material are incorrect.
Conclusion:
包子的错误很少,整个文章都很连贯,尤其的听力细节部分很赞,求指导ing ><
还有就是,标黄标的真心舒畅有木有,哇哈哈^
感觉看过包子几篇文章,不用统一的模版却胜似模版,希望再接再厉,多挖掘更多更好更合适自己的methods.-- by 会员 lunating (2012/6/18 11:51:02)