so...as to...和so...that...的区别，注意so可以体现因果的逻辑

不过我有一个疑问，如果按照不定式和从句的逻辑，那so...that...这个句型不就不会存在吗？这个句型本来就是描述一个事情慢慢变化以至于导致了另外一个状态，所以这个句型本来就是主观变化的，可是它还是用that啊

1+1 根号2的根号2

题目比较的是mx+ky和kx+my的大小，也就是mx+ky-kx-my=m(x-y)+k(y-x)=(m-k)(x-y)的大小
条件1，2单独存在不能推出(m-k)(x-y）的大小
1）+2）： m>k,m-k>0,x>y,x-y>0,所以（m-k)(x-y)>0，mx+ky>kx+my

the sum of the first n positive integers 前n个正整数的和

C和E分不清
大神来讲讲吧。。

have the capability to 是不是和could重复啊

could 和 have the capability 是不是重复了？

dinosaurs and birds that（定语从句会就近修饰一个复数名词） have yet been discovered

who have asthma also suffer from hay fever.

The first is an explanation that the argument challenges; the second provides evidence in support of a competing explanation that the argument defends 保护 （explanation ）

d，可能除了那5个订单，还有别的订单是发到TRUAX的

a plausible explanation 合理的解释

if it did是应该是虚拟条件句？与现在事实相反？

这道题没有太搞懂诶，求解释

If an unrefined olive oil is intermediate （在。。中间）in acidity between two other unrefined olive oils, it will also be intermediate between them in quality.

如果一种未精制的橄榄油在两种其他未精制的橄榄油之间的酸度中间，则它们之间的质量也是中间的。

prohibitive 禁止
outlay 支出

In the shark's jaws, many spare teeth lie in seemingly limitless reserve（名词）, each one （同位语）ready to slide into the appropriate position whenever an active tooth is lost or worn down.

the ability身后只能加不定式to do而不能加介词短语of doing
are capable of recognizing

until 连词 句子
until 介词 具体时间