There is always a heated debate over the objectivity of observations建议这样没有实质性内容的话尽量不要在开头出现Some people especially some metaphysicians arguer that all the observations are always subjective and guided by the observer's expectations or desires, while some materialists arguer that observations are always objective. As to me, this issue should be based on a case-by-case analysis.个人觉得你之所以觉得难可能是因为在第一段作了这样唯物主义和唯心主义的区分，其实要是把认为观察是主观的看作cynics的特点,而他们认为人总是倾向于观察到事物乐观的一面会好写一些For, example:
politicians are likely to observe that support for him or her is always high, scientist tend to observe fact which lend strong support for their theories, and businessmen incline to hold a blindly optimism about the macroeconomy despite the phantom of depression's obviousness.
To better address the issue, I have to give a definition to observation in the first place. As observations can be both about the outside world and our inner world, my definition about observations is what we see and hear as well as our feelings and recognitions about things around us. Although what we see and hear can be objective, when our feelings and recognitions are involved, observations could be objective.这一段的后半部分虽然到了正题，但还是觉得可以把这段再缩一缩
In the artistic world where our feelings and recognitions regulated语态 our observations, observationsthey尽量不老是重复一个名词 are always subjective. The main reason lies in that art itself is subjective representations of our inner world and could only be observed through a subjective method. In the subjectivity of our inner world lies reason that no objective way can look into our mental worldPeople are always required to relate the art works with their own experience and rebuild them in their own ways which render the observations rather subjective and personal. The observations are usually guided by the observers’ desires and expectations. The early listeners of Beethoven who expected to find predicted harmonies and melodic lengths were so disappointed at his symphonies that they denounce it as “literally causing their ears to hurt.” However, when the early listeners observed discord from the symphonies, the public today observed strength and accordance from the same works. In this sense, observations are always subjective and personal in artistic area.这个例子换用在这里倒是蛮合适的
When turning to scientific area, observations can be both subjective and objective. Different from art works, sciences deal with outside world. Scientific observations are always这个词有一点绝对 based on statistics from experiments as well as our experience. Such kind of methodology adds objectivity to its observations. In fact, science is aimed turning people’s subjective observations into objective ones. When our ancestors who expected that human is the elite of the world and made the subjective observation that the earth is the center of the universe, it is science that broke this illusion. When people used to make subjective observation of natural catastrophes and believed them to be the will of God, it is science that saved people out of such ignorance. 引例恰当，不过也可以考虑进化论的例子However, subjective observations do exist even if the theories based on them are correct. As the scientific evidence is limited, sometimes, scientists have to add their own imaginations in their observations which render them subjective. Quite different from those in the artistic area, such kind of subjective observations are not always guided by the expectations and desires of the scientists but based on existing evidence. When Darwin呵呵，原来在这用上了 made his subjective observation that men were evolved from anthropoids, he developed his law of evolution which has the dominant place today in the biological world. When the astronomies made subjective observation about the big-bang to be the origin of the universe, it helps us to explain many mysterious phenomena in the universe. Therefore, in the scientific world, observations can be both subjective and objective, but both of them could be valuable.
In sum, observations can be both subjective and objective. When deal with the inner world, subjective observations based on people’s expectations and desires are always made. When comes to the outside world, both subjective and objective observations can be made, but subjective observations could be made by existing evidence rather than people’s expectations and disires.