The types of molecules that can do this are themselves substantially hydrophobic in nature such as carbon dioxide, oxygen or ethanol.疑问：这句话中 themselves 是做表语么？那么 substantially hydrophobic 又是什么成分？
Day after day she studied so hard and with such hunger and thirst that
at last she became a zhuangyuan in this knowledge contest.请问老师with such hunger and thirst和什么并列，为什么前面使用了and?
Parents now see failures as a terrible disaster with negative
consequences as opposed to something their children could recover and grow
from. 各位老师，这个句子没太看懂，第二个as 是什么作用？请指教！
If you smell or hear a gas，get everyone outside and open the windows and doors. If you can do it safely，turn off the gas. Report it to the gas company.两个it分别指什么呢？
为什么语法会创造出非谓语呢？下面这句话完全可以写成第二句，为什么要采用分词形式呢？Jim attacked a
boy, accusing him of his improper behavior. Jim attacked a
boy and accused him of his improper behavior.
This starts off following a gentle river valley but the last part is quite exposed so the snow conditions can be challenging. following 作介词时候常表示在（某事）以后，但此following后跟地点，请问这个following在此是否表示在某地点之后。