1. That fact, let alone the current division between the 11 euro countries and the four, led by Britain, that have not joined, is likely to mean that the Union should become a multi-system entity, with some countries signing up to everything and others choosing only some things.
更不用说欧盟11国和还没有加入欧盟的英国领导下的四国时下的决定，事实意味着联合国应当成为一个多系统的实体，一些国家签署每一件事情，另一些国家只能选择某些事情。
That fact, let alone the current division between the 11 euro countries and the four, led by Britain, that have not joined, is likely to mean that the Union should become a multi-system entity, with some countries signing up to everything and others choosing only some things.
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2. This trend began during the Second World War, when several governments came to the conclusion that the specific demands that a government wants to make of its scientific establishment cannot generally be foreseen in detail.
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3. Observations were made of the children at the beginning and at the end of preschool and first grade.
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of the children at the beginning and at the end of preschool and first grade.为介词断语做定语，修饰Observations，由于太长所以后置，本句主结构为：Observations were made ，为被动，但在翻译时通常翻译为主动，故意思为：人们在学龄前开始和结束及一年级对孩子们进行了观察。
4. Whether to use tests, other kinds of information, or both in a particular situation depends, therefore, upon the evidence from experience concerning comparative validity and upon such factors as cost and availability.
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