Throughout the rest of the lactation (milk production) period, which lasts from 4 months to 3 years depending on the species, mother otariids。。。
Zoologists had assumed that females of all phocid species, by contrast, 。。。, fast throughout the entire lactation period, which lasts from 4 to 50 days depending on the species.
I quite agree with you. That’s a better way of looking at it.
无论这是不是一个更好的方法，都不影响“观看”这个事件的发生，只不过另外一个人可能提出了一个更好的角度来看待问题而已（所以，一般better way后面都加of）
We must find a way to solve these problems.
在“发现方法”这个事件对能否“解决困难”有很直接的影响
（转）其实这题的fatal error就在于caused by xxx的xxx上，至于同位语还是定语从句，如果用Ron的话说就是both are fine，无法作为the basis of elimination of the option，我们要排除某个的依据是致命错误，真不是这个比那个感觉好所以选这个啥那个。首先搞清楚，温室效应is caused by 人类燃烧煤炭，注意，既不是casued by人类，也不是caused by煤炭，而是人类燃烧煤炭这个动作，或说这个举措，这也是本道题的考点。
Ron对此反复举例说明，怎么用名词性结构来形容一个动作？要用“所有格”结构。即“sb\'s doing/done”。例如: People laughed at my walking to the classroom, 人们笑的既不是我也不是教室，而是我走向教室的这个动作。
A，when或者at which都可以。when可以指代整个时间状语，如on the day，which则只指代名词，需要补出时间状语里的介词。A补足就是：it is known that humans made stone tools at the earliest date，众所周知人类最早时候制造了石器。
B，had错误。全句只有一个另外的动词时has dated，是现在的动作，不能用had。
C，humans are known to have made stone tools at the earliest date。与A相比，二者被知道的对象不同，一个是某件事情被知道，一个是人类被知道做了某件事情。这里人类是知道的对象。
D，that只能指代名词，需要补足时间状语里的介词。humans are known to be making，making表示和are相同的时间框架，错误。
pushing back by more than 150,000 years the earliest date at which humans are known to make stone tools.
by接数字，表示往回推了多少年，如：The population has been reduced by 1000.人口减少了1000.
这里将back前置了，正常语序是pushing the earliest date at which humans are known to make stone tools back by more than 150,000 years，将人类最早使用石器的日期往前推了15万年。at which做定语修饰the earliest date。
be known/thought/believed to do sth：
看法类动词的被动语态可以用不定式，如：James is believed to be a good guy.当我们说“詹姆斯被认为是一个好人时”，我们并没有预设“詹姆斯是一个好人”这件事是事实。换句话说，詹姆斯是好人这件事可能只是大家的看法，而并非实际的事实。因此，此时，看法类believe动词实际上就控制了“詹姆斯是好人”这件事的发生（如果大家不这么认为，那詹姆斯是好人这件事可能也就不存在了）。
Generally, SUBJECT + V. + COMPARATIVE should not be followed that or those.
Incorrect: The company had higher profits in 1990 than those in 1980.
Correct: The company had higher profits in 1990 than in 1980.
Citing faulty voting equipment, confusing ballots, voter error, and problems at polling places,
cite，引用，列举，如：
He cited his heavy workload as the reason for his breakdown. 他说繁重的工作负荷是导致他累垮的原因。
People who do regular volunteer work are only somewhat more likely than others to characterize the work they do for a living as "doing good." characterize sth as sth，描绘某物是某物，作为
Diners seated on stools typically do not linger over dinner as long as diners seated at standard tables.as long as可以表示只要，做连词，后面接句子，如：As long as you do that, then the rest is kind of simple and easy.; 也可以表示和……一样长。
many farmers in these areas are likely to reduce their output as the water supply they need in order to maintain production shrinks.they need in order to maintain production做定语修饰water supply，shrinks做water supply的谓语动词。as做不了介词表示作为，是，就只能做连词，表示因为/像……一样。这个时候需要找后面从句的谓语动词。
Most agricultural practices in areas with water shortages are water intensive.大多数农业操作在这个缺水区域的是水密集型的。intensive，集中的，集约的。labor/capital/technology/water intensive，劳动力/资金/技术/水密集型
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想问一下和mba官方的6套prep题有重复吗？还是完全覆盖
同问，跟那6套题有没有重复？