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参照上下文翻译划线的句子：
(1)I stand here today humbled by the task before us, grateful for the trust you have bestowed, mindful of the sacrifices borne by our ancestors. I thank President Bush for his service to our nation, as well as the generosity and cooperation he has shown throughout this transition.
Forty-four Americans have now taken the presidential oath. The words have been spoken during rising tides of prosperity and the still waters of peace. Yet, every so often the oath is taken amidst gathering clouds and raging storms.
(2)At these moments, America has carried on not simply because of the skill or vision of those in high office, but because we have remained faithful to the ideals of our forbearers, and true to our founding documents.
So it has been. So it must be with this generation of Americans.
(3)That we are in the midst of crisis is now well understood. Our nation is at war, against a far-reaching network of violence and hatred. Our economy is badly weakened, a consequence of greed and irresponsibility on the part of some, but also our collective failure to make hard choices and prepare the nation for a new age.(4) Homes have been lost; jobs shed; businesses shuttered. Our health care is too costly; our schools fail too many; and each day brings further evidence that the ways we use energy strengthen our adversaries and threaten our planet.
These are the indicators of crisis, subject to data and statistics. Less measurable but no less profound is a sapping of confidence across our land - a nagging fear that America's decline is inevitable, and that the next generation must lower its sights.
Today I say to you that the challenges we face are real. They are serious and they are many. (5)They will not be met easily or in a short span of time. But know this, America - they will be met.
On this day, we gather because we have chosen hope over fear, unity of purpose over conflict and discord.
判断哪个是错的：
(1).This applies particularly to chemical businesses, because chance discoveries in them play a much larger part than those in physical and mechanical industries.
A．这尤其可见于化工企业，因为同物理与机械企业相比，化工企业里的偶然发现的机会要大得多。
B．化工企业里的情况尤其如此，因为化工企业里的偶然发现比物理与机械企业里的偶然发现重要得多。
(2).Without modern weapons, man would make a very poor show of disputing the ownership of a cave with a bear. The last creature to compete against man is the mosquito, but even the insect has been subdued by attention to drainage and by chemical sprays
A. 能够与人竞争的生物最后只有蚊子了，然而即使蚊子，也由于我们注意清理污水和化学喷洒而被制服了。..
B. 蚊子是最没有能力与人争斗的生物了，但人还是凭借清理污水和化学喷洒才把这小小昆虫打下去的。
(3).They fear that the agents of other firms might trace the kind of research they are likely to be undertaking..
他们生怕别的公司的情报人员据此摸到他们可能正在从事的某项科研项目是什么 。
他们生怕别的公司的情报人员据此摸清楚他们可能要从事的某项科研项目是什么。
(4).Before becoming a retirement village, Silicon Valley may prove a classroom for building a global business.
在硅谷变成一个退休村之前，它很可能成为一个建立全球商业的教学基地。
在硅谷变成一个退休村之前，它很可能成为一个建立全球企业的教学场地。
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