Gravitational waves—ripples in the geometry of space-time—are analogous to electromagnetic waves. The challenge in trying to observe these waves directly is that they are extremely weak. To make waves large enough to be detectable, the most voilent events in the universe are required: supernova ...
Are we at the beginning of another Age of Exploration? Perhaps even more important, are we at the beginning of another Age of Colonization? As the population of the world increases towards the point where the earth can no longer support all the people 1___ on it, the second question become...
...You can tell this by café life. French cafés are always
crowded. Not all the customers are tourists. When do these people work? The
French take their 35-hour workweek seriously—so seriously that some labor
unions recently struck a deal with a group of companies limiting the number of
hours that ...
It was used for sudden emergencies, such as the time when Christine
broke her arm and had to be taken to a doctor.这是高中英语新教材译林版必修1第2单元的句子(p25)。请问句子中的 such as the time when 可以简化成 such as
when 吗？其中的 the time 可以省略吗？
Science, in practice, depends far less on the experiments it prepares than on the preparedness of the minds of the men who watch the experiments.事实上，科学很少依赖于事先准备好的实验，而是更依赖于实验观察者有所准备的头脑。一问：句子中far less和on可以...
...的 Unit 1（p11）有这样一句：Good habit formed
at youth make all the difference.—Aristotle在词典上可以查到 make a
difference，意思是“有影响”“有关系”“起作用”，但没有查到 make all the difference 的意思和用法。
The
way we consume and acquire it, the fashion in which it gets cooked and by whom, who is invited
to the table and who eats first, such tradition is a form of nonverbal
communication – a social code abundant with meaning.译文：我们消费和获取食物的途径、烹饪食物的方式、厨...
... was born in Los Angeles,California, 30 years ago. I have had
autism since the age of 3, which means communication has always been a big
problem for me. Like everyone else in the world, I have an up-and-down life, during which I went
through some of the journey that has been a rocky roadblock. It wa...
选词填空题干：Choose one appropriate word from the following word bank to fill in the blanks numbered from 1 to 15 in the passage below. Change the word form where necessary. Remember the bank contains some extra words that may not be used in filling any of the blanks. Write the words in thei...