Inequalities due to environmental factors must be overcome by some form of preschool preparation at least one year for all and two or even three for some.
These underestimated the actual age by factors of 10 to 50 because much of the sedimentary record is missing in various locations and because there is a long rock sequence that is older than half a billion years that is far less well defined in terms of fossils and less well preserved. 不懂th...
...the beginning of the long process of integration that will ultimately lead to a fully electronic human before the end of the next century. 句中that代指的先行词是integration吗？ 是否it be...that 句型中，先行词是前边的表语成分？ 还是可能是integration也...
... phony or, worst of all, boring as we went from Wordsworth's daffodils to Baudelaire's flowers of evil.这里的somewhere怎么翻译，翻译为“某个地方”吗？为什么我看一些解析上，是翻译成“大约”，有点理解不了。
The medicine is more effective than is expected.这句话可不可以变成:The medicine is more effective than is expected to be.第一句看成省略了做主语的关系副词what，第二句省略了做宾语的关系副词what和主语the medicine?
We usually left home at three o'clock , stayed in the restaurant, and then traveled on to one of his hunting houses.请问“stay”为什么不用现在分词作伴随状语呢？这个动作不是由主语发出的吗？
We usually left home at three o'clock , stayed in the restaurant, and then traveled on to one of his hunting houses.请问“stay”为什么不用现在分词作伴随状语呢？这个动作不是由主语发出的吗？
___________ arriving at the camp,the coach asked us to ski. I skied carefully,but....题目答案是when, 想问一下，还可以是while吗？when doing等于while doing?这里arrive 是短暂性动词，用了ing形式，表示“即将”吗？
...yed 651 college freshmen both before and after spring break.They were able to control for student behavior before spring break, which was a strong predictor of behavior during break.
请问这里为何用control for呢，control不是及物动词吗？